United States Court of Appeals For the First Circuit

No. 22-1192

UNITED STATES OF AMERICA,

Appellee,

v.

JOHN MICHAEL RATHBUN,

Defendant, Appellant.

APPEAL FROM THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF MASSACHUSETTS

[Hon. Mark G. Mastroianni, U.S. District Judge]

Before

Kayatta, Lynch, and Thompson, Circuit Judges.

Judith Mizner, Assistant Federal Public Defender, for appellant.

Randall E. Kromm, Assistant United States Attorney, with whom Rachael S. Rollins, United States Attorney, was on brief, for appellee.

April 5, 2024 THOMPSON, Circuit Judge. In today's appeal, John

Michael Rathbun ("Rathbun") seeks to undo his conviction related

to his creation of a homemade firebomb that he placed near a Jewish

living facility in Longmeadow, Massachusetts. Following two

separate trials arising out of the bomb's discovery, federal juries

found Rathbun guilty of: (1) attempting to transport and receive

an explosive device; (2) attempting to damage and destroy

buildings, vehicles, and real and personal property by fire and

explosion; and (3) making false statements during an interview.

The success of Rathbun's appeal primarily depends upon whether we

side with him in his vigorous protestations that the district court

erred in admitting irrelevant, biased, and prejudicial testimonial

evidence, and in allowing repeated references to inappropriate and

highly charged religious topics -- all of which, according to

Rathbun, robbed him of a fair trial. For the reasons outlined

below, we affirm.

A. BACKGROUND

At the outset, "[w]e note that our recitation of the

factual background is, of course, done in the light most

complimentary to the jury verdict." United States v. Belanger,

(1st Cir. 2018) (citing United States v. Negrón-

Sostre,

(1st Cir. 2015)).

- 2 - I. The Crime

Converse Street, located in Longmeadow, Massachusetts,

is not just any ordinary street -- rather, it's a major

thoroughfare for town traffic and notably, it is the location of

the Jewish Geriatric Services Inc.'s ("JGS") campus, a 25-acre

living community that houses 350 people. Guided by Jewish values,

JGS is a non-profit corporation that provides housing and nursing

services to elderly individuals and their families. Its campus

consists of several buildings, including: Genesis House, a

subsidized housing complex; Ruth's House, a nursing home; an adult

day care center; and a rehabilitation center.

On the morning of April 2, 2020, a suspicious item was

spotted on Converse Street by a neighborhood resident near the

entrance to the JGS. After receiving a 911 call about the peculiar

package, law enforcement agents responded and discovered a five-

gallon yellow fuel can containing both gasoline and a charred paper

wick. In their examination of the item, they observed what

appeared (and was later confirmed) to be blood on both the fuel

container and wick. Follow-up investigation revealed that the

paper wick was made of pages from a religious tract, published by

the Billy Graham Evangelistic Association (the "BGEA"), entitled

- 3 - Steps to Peace With God.1 Rathbun became a suspect in the planting

of the device when the Massachusetts state lab identified the blood

on the device as belonging to him.2

Before we go any further, it would be helpful to discuss

Rathbun himself. In 2020, Rathbun was a thirty-six-year-old man

living with his parents, Sheila and Jeffrey Rathbun,3 and his

teenage daughter. During this time, Rathbun was experiencing a

fair amount of personal and professional strife. For one, he had

recently been fired from his job. For another, he, according to

his family, often displayed a concerning demeanor -- agitation,

defensiveness, and edginess. And arguments with his mother and

daughter occurred frequently. Rathbun was also experiencing

substance use disorder, a condition he had developed during his

teenage years.

1 The parties use "pamphlet" and "tract" interchangeably to refer to the Steps to Peace With God literature and we follow their lead. 2 The record is silent as to why Rathbun's DNA was held in a state police data bank. Nonetheless, during an interview police conducted with Rathbun pursuant to their ongoing investigation, law enforcement took a cheek swab from him which was sent to the Massachusetts State Police testing facility where the blood from the device and tract were stored. Testing revealed a DNA match. 3 At times this opinion will refer to Rathbun's parents by their first names. This is to avoid confusion, and not intended to be disrespectful.

- 4 - II. The Investigation

Following a successful DNA identification of Rathbun's

blood on the device, FBI Special Agent Ryan McGonigle ("Agent

McGonigle") obtained a warrant to search the Rathbun family's home

and vehicles. In their execution of the warrant, agents came

across and seized red gas canisters, two of which contained

gasoline. Also located and removed were yellow and red nozzles,

but no other seemingly germane evidence of bomb-making or bomb-

making substances was unearthed. A cell phone belonging to Rathbun

and a computer belonging to Sheila were seized for later forensic

analysis. Of note, agents also found various religious pamphlets

and tracts throughout the home and in Sheila's car, though they

did not locate another copy of the particular pamphlet, Steps to

Peace With God. Relevant to this search of Rathbun's home and

family vehicles, and to Rathbun's challenges here, it's important

to note that at this point in the investigation, the concatenation

of accumulated evidence had caused the government to suspect that

Rathbun's actions were motivated by anti-Semitism.4 That said, no

4 A portion of the affidavit issued in support of the search warrant was captioned "The Discovery of a White Supremacist Organization on Two Social Media Platforms and the Targeting of Ruth's House in Longmeadow, Massachusetts." That portion of the affidavit described the FBI's discovery of a user of two social media platforms promoting mass killings against religious minorities and specifying Ruth's House as a target. Further, the affidavit described that users of the platform designated April 3, 2020 as "jew killing day." Rathbun was never tied to any of these platforms.

- 5 - anti-Semitic or white supremacist materials were unearthed during

the search.5

Circling back to the search scene, Rathbun, at the time,

consented to a voluntary interview with Agent McGonigle and

Longmeadow Police Officer Chaplin ("Officer Chaplin") and,

pursuant to that questioning, Rathbun signed a Miranda6 waiver.

Over the course of a three–hour inquisition, which included several

breaks,7 Rathbun insisted that he was home on the morning of April

2, the day the device was located, and that he had not left his

home in over two weeks. Rathbun also told investigators that he

knew Converse Street well because he drove it frequently, but he

denied knowing much about Jewish landmarks on the street, including

Ruth's House or about the area where the fuel container was

discovered. Similarly, Rathbun denied ever seeing the Steps to

Peace With God tract but acknowledged that his parents were very

religious and sometimes distributed religious tracts and

5 After further and routine evidentiary examination occurred, the religious bias theory was eventually discarded. On November 9, 2020, the date of Rathbun's first trial, the district court granted the government's motion to strike the request for a special finding of a religious motive after the government noted that it was unable to find any evidence linking Rathbun to anti-Semitism or white supremacy. 6 See generally Miranda v. Arizona,

(1966). 7 The record reflects that the interview had a casual atmosphere as Rathbun took several breaks to smoke cigarettes, kick a soccer ball, and play with the family dog.

- 6 - pamphlets. When shown a picture of the yellow fuel container,

Rathbun denied ever seeing or possessing it. When informed that

his blood was found on the container, Rathbun told investigators

that he had no idea how that could possibly be.8 But after Rathbun

was confronted with the factual reality that his blood was found

on the wick and container, according to Agent McGonigle, Rathbun's

demeanor changed and he terminated the interview. Feeling armed

with more than enough probable cause, agents placed Rathbun under

arrest.

Further investigation continued. It revealed that

Rathbun had made several false statements during his interview.

For example, forensic analysis of his cell phone showed that

Rathbun was not home on the morning of April 2, as he claimed, but

was instead about four to five miles away from the house driving

around in his mother's car. Further, during a recorded phone

conversation from jail with his mom, Rathbun acknowledged that he

had driven down Converse Street on April 2, during the timeframe

the fuel container was placed near the JGS campus. In yet another

call with Sheila, Rathbun admitted that he did in fact possess the

8 At trial, Agent McGonigle testified that he looked at Rathbun's hands for anything that might explain the presence of his blood on the fuel container. Agent McGonigle testified that he observed an open cut on Rathbun's thumb, which Rathbun attributed to dry hands.

- 7 - yellow fuel container found on Converse Street, despite his

repeated assertions to investigators that he did not.

Subsequent police work also established familial

connections between Rathbun and Genesis House, undermining his

assertion that he was unfamiliar with the area where the fuel

container was found or with the JGS complex. Specifically,

investigators learned that Rathbun's grandmother had lived at

Genesis House for seven years prior to her death, and that Rathbun

had visited her there on many occasions. Additionally, it was

determined that Sheila had previously worked as a comptroller for

Carr Properties, the management company that oversees Genesis

House.

The evidence implicating Rathbun continued to mount when

detectives learned that the BGEA toured the Northeast in 2019, and

hosted a large event on May 25, 2019, which Jeffrey and Sheila had

attended. It was also determined that Curtis Rowe ("Rowe"), Pastor

of Heritage Baptist Church where Sheila and Jeffrey were

congregants, was hired as a contractor to promote the event.

Notably, copies of the Steps to Peace With God tract were given to

all active participants who assisted with the preparation of the

events. Further, the forensic examination of Sheila's computer

yielded documents and files related to the tour. In their

investigative efforts to try and piece together the logistics of

how Rathbun could have committed the crime, police reviewed

- 8 - Rathbun's phone logs, which revealed a couple of pertinent facts:

First, Rathbun had actively used his phone during the morning of

April 2; and second, the cell phone was not active during two

crucial periods -- (1) from 4:38 a.m. to close to 5:00 a.m. and

(2) from 6:09 a.m. to 7:06 a.m. -- the two windows in which the

fuel container would likely have been placed at the JGS campus.

In putting it all together, detectives theorized that Rathbun had

traveled to the targeted area where the device was placed while he

was driving home from his admitted drug dealer's crib after copping

and ingesting crack and cocaine. Retrieved cell phone data

supported the government's theory.

III. Procedural Background

Ultimately, a superseding indictment issued charging

Rathbun with: (1) Count One, attempting to transport and receive

an explosive, in violation of

(d);9 (2) Count Two,

attempting to damage and destroy buildings, vehicles, and real and

personal property by fire and explosive, in violation of 18 U.S.C.

9 In relevant part, section 844(d) provides that: [w]hoever transports or receives, or attempts to transport or receive, in interstate or foreign commerce any explosive with the knowledge or intent that it will be used to kill, injure, or intimidate any individual or unlawfully to damage or destroy any building, vehicle, or other real or personal property, shall be imprisoned for not more than ten years, or fined under this title, or both . . . .

- 9 - § 844(i);10 and (3) Count Three, making false statements during his

interview with Agent McGonigle, in violation of

(a)(2).11

Following extensive preliminary proceedings, trial got

underway in November 2020 and a jury eventually convicted Rathbun

on Count Three, making false statements. However, it deadlocked

on Counts One and Two, causing the court to declare a mistrial as

to them. The case went to trial a second time in June 2021 and

10 In relevant part, section 844(i) states that: [w]hoever maliciously damages or destroys, or attempts to damage or destroy, by means of fire or an explosive, any building, vehicle, or other real or personal property used in interstate or foreign commerce or in any activity affecting interstate or foreign commerce shall be imprisoned for not less than 5 years and not more than 20 years, fined under this title, or both . . . . Notably, the indictment also included a request for a special finding that the object of the crime was selected based on actual or perceived race, religion, or national origin. As previously noted, this request was subsequently dismissed by the government. 11 And section 1001(a)(2) provides, in pertinent part, that: [e]xcept as otherwise provided in this section, whoever, in any manner within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States, knowingly and willfully makes any materially false, fictitious, or fraudulent statement or representation shall be fined under this title, [or] imprisoned not more than 5 years . . . .

- 10 - Rathbun was found guilty on both Counts.12 Unhappy with the goings-

on below, Rathbun timely appealed and here we are.13

B. DISCUSSION

As best we can understand and capture Rathbun's

grievances, he raises several claims as to the conduct of trial,

which, reduced to their core essence, seem to boil down to one

broad, overall gripe. Here's how Rathbun, in his own words,

articulates his overarching appellate contention: "The

Government's Presentation of Evidence Relating or Alluding to the

Christian and Jewish Religions and its Repeated

Contrasting/Juxtaposition of the Christian Religious Tract Used as

Wick in the Fuel Container and the Jewish Nursing Home as the Site

Where the Container Was Found Was Erroneous and Denied Mr. Rathbun

a Fair Trial." Then, to expatiate this generalized claim of trial

error, he points to four specific blunders which he asks us to

review and reverse. First, he says the district court made

evidentiary mistakes by admitting the testimony of several of the

government's witnesses. Second, he accuses the government of

engaging in objectionable conduct at a few key moments during the

trial wherein irrelevant religious themes got improperly injected

into the proceeding, the cumulative effect of which prejudicially

12In due course, the district court handed down a sentence of 60 months' immurement and three years' supervised release. 13 Rathbun does not appeal the Count Three conviction.

- 11 - denied him a fair trial. Third, he says the district court erred

in allowing into evidence, to his detriment, inadmissible

propensity evidence. And fourth, he advances a catch-all

cumulative error challenge contending the total cabal of trial

mistakes necessitates reversal. In our careful consideration of

Rathbun's claims, we conclude none has merit. To explain our

reasoning, we begin our analysis with his challenges to the

district court's evidentiary calls.

I. Alleged Evidentiary Bungles and Cumulative Effects

Rathbun contends that the district court abused its

discretion when it admitted, over his various objections,

testimonial evidence from three government witnesses: (1) Rabbi

Chaim Kosofsky ("Rabbi Kosofsky"), (2) Robert Hill ("Hill"), and

(3) Steven Rhoads ("Rhoads"). As Rathbun tells it, the testimonies

of these witnesses were inadmissible because they were irrelevant

to the elements of the offense or to any defense, and, in the case

of Rabbi Kosofsky, cumulative. Alternatively, even if this

testimonial evidence may have had some marginal relevance, it

should have been excluded, says Rathbun, because its probative

value did not outweigh the prejudicial impact of admitting it.

We have held that, when preserved, "a district court's

determination as to the admissibility of witness testimony is

reviewed for abuse of discretion." United States v. Occhiuto,

(1st Cir. 2015). This standard, applicable here,

- 12 - governs all aspects of Rathbun's evidentiary challenges. United

States v. Dudley,

(1st Cir. 2015); Occhiuto,

.

a. Rabbi Kosofsky

We'll start with Rathbun's beef with Rabbi Kosofsky's

testimony. And in doing so, we set forth a good bit of procedural

history surrounding Rabbi Kosofsky's testimony so that the curious

reader can better understand how hotly contested the admissibility

of this evidence was below.

Prior to Rathbun's first trial, the government informed

him of its intention to present several JGS residents who would

testify about their reaction to the discovery of the fuel

container. Though they had not personally observed the

contraption, they had heard about it and had reactions to what had

purportedly transpired. This reaction testimony, the government

argued, went to an element of the charged offense, to wit, that

Rathbun knew or should have known about the foreseeable damage his

conduct would cause and thus it proved he had acted "with the

knowledge or intent that [the firebomb would] be used to kill,

injure, or intimidate any individual" under § 844(d).14 In urging

14 "The actual recipient's reaction to the [firebomb] shows that the recipient did perceive the [firebomb] as a threat. This reaction is probative of whether one who makes such a [device] might reasonably foresee that such a [device] would be taken as a threat." United States v. Fulmer,

(1st Cir. 1997) (discussing reactions to a threatening statement).

- 13 - its admissibility (over Rathbun's objection), the government noted

that this court has on prior occasions found victim reaction

testimony relevant to the nature of a threat and thus allowable.

See United States v. Fulmer,

(1st Cir. 1997).

Unconvinced and concerned about the evidence's potential for

unfair prejudice and confusion, the district court excluded the

testimony of those witnesses who had heard about but had not

witnessed the mechanism.

Following mistrial on Rathbun's deadlocked counts, the

government, prior to the second trial, again sought to introduce

reaction testimony to establish § 844(d)'s intimidation element.

This time, the government more specifically sought to elicit the

testimony of Rabbi Kosofsky, a longtime Converse Street resident

whom the government learned about following Rathbun's first trial.

According to the government's proffer, Kosofsky, who had heard

about the device the very day it was found, would testify "that he

felt threatened and vulnerable by the discovery of the device."

The government argued that Kosofsky's testimony was different from

the testimony of the other reaction witnesses it had previously

sought to call because Kosofsky had learned about the device

virtually contemporaneously with its discovery by local police,

and therefore his "reaction was untainted by the subsequent

allegations of white supremacy or anti-Semitism and the

corresponding media coverage of the case" -- information that may

- 14 - have, according to the government, improperly colored the

testimony of other proposed reaction witnesses.

Rathbun, contending that Rabbi Kosofsky's testimony

would fall squarely within the ambit of the court's prior

exclusionary ruling, objected to it, questioning the relevance of

the testimony and urging that the very presence of a religious

cleric at trial would interject unwarranted religious bias into

the case. Consistent with its prior position, the court ruled

that Kosofsky could not testify about the discovery of the device

because he had not personally witnessed it. And continuing, while

his testimony might have had some degree of relevance, its

potential for prejudice and confusion outweighed its probative

value.15 Further addressing the government's importuning that

Kosofsky's testimony was vital to its ability to meet its

evidentiary burden, the court observed that the government,

contrary to its assertions, was not prejudiced by the court's

exclusionary ruling because the government could establish

15 More specifically, the court stated that: Mr. Kosovsky [sic] was close to the scene, but did not see the container and formed his reaction indirectly based not on the container itself, but rather the response to its discovery. His personal feelings regarding the incident and concerns about anti-Semitism are understandable, but as the prosecution theory of the case does not include anti-Semitic motivations, the risk of prejudice from Mr. Kosovsky's [sic] testimony is too great.

- 15 - § 844(d)'s intimidation element through other relevant evidence,

such as the area's population density, the proximity of homes to

the fuel container, and the characteristics of the fuel container.

Undeterred and before the second trial got underway, the

government gave notice to Rathbun that it still intended to call

Rabbi Kosofsky as a witness, apparently steadfast in its

determination that Kosofsky had relevant testimony to offer which

had not been precluded by the court's prior order. After learning

of the government's plan, Rathbun filed another motion in limine

seeking to bar Kosofsky's testimony, contending that the court's

previous order "left nothing for the government to elicit from

Rabbi Kosofsky" and whatever quanta of relevant testimony he might

offer that was not covered by the order was not worth the

overwhelming confusion and prejudice that would flow from the

appearance at the trial of a religious clergyman. Such prejudice

was particularly acute, said Rathbun, since the government had

abandoned its hate crime motivation theory.

In considering Rathbun's motion and the government's

additional proffer, the court held that Rabbi Kosofsky's testimony

would be permitted but it would be limited in scope. He could

touch upon areas such as the neighborhood characteristics

"including population density and proximity of homes to the

container. Kosofsky [could] also testify about the level of

pedestrian traffic in the area." What the Rabbi could not speak

- 16 - of was "the religious beliefs or practices of pedestrians or the

presence of other Jewish institutions located on Converse Street,"

because, as the court concluded, such evidence would be unfairly

prejudicial since the government had jettisoned its theory that

Rathbun was motivated by anti-Semitic sentiments.

Following that ruling and once the second trial got

underway, Rathbun, undaunted, again moved to exclude Kosofsky's

testimony for reasons already pressed. He further urged that even

Kosofsky's limited testimony, which the district court had deemed

relevant, would be cumulative and therefore a waste of time because

the government had several other neutral and less controversial

witnesses -- such as members of the police and fire

departments -- who could identically testify about the

characteristics of Converse Street. The court denied Rathbun's

motion.16 Then, when Rabbi Kosofsky was called to the stand, the

district court reaffirmed its limiting instruction and, employing

a belt-and-suspenders approach, directed him to testify in

accordance with its ruling, which he did.17 And, mindful of the

16The court stated that "[t]he balancing is -- I have to be really careful. But Rabbi Kosofsky lives in the neighborhood, and I'm not going to prohibit him from testifying. So with that having been said, he can identity certain buildings in the area in a generic sense." 17To precisely pin down government counsel's understanding of the permissible boundaries of the court's in limine ruling, the court at sidebar asked the prosecutor to briefly summarize the

- 17 - religious bias debate that had preceded his testimony, the parties

and court referred to the Rabbi as Mr. Kosofsky when he took the

stand.

Aside from the objections Rathbun had lodged ahead of

trial, the sole relevant objection before us occurred when Rathbun

objected to Rabbi Kosofsky's trial testimony describing his

contours of Rabbi Kosofsky's anticipated testimony as the Rabbi understood them to be, which he did: Okay. Very briefly, he will say where he lives; what is located directly across the street, which is the Jewish nursing home complex. He'll say he's familiar with it because he, as part of his position, does work there from time to time; that he provides pastoral care there; that he brings children there from time to time on certain holidays; and that he delivers newspapers to people in Genesis House and I believe Ruth's House. He will describe the campus and the buildings that they contain. He'll talk about the foot traffic and vehicle traffic on the road directly across the street from his house, which is the driveway entrance to Ruth's House and Genesis House. He'll talk about the vehicular traffic on Converse Street, the foot traffic on the sidewalk. He will talk about the traffic coming in and out of the driveway. He will talk about the busses that pass on the street, as well, that's part of the vehicular traffic and the fact that they bear signs that say "Jewish Home" on their marquees. He will say that on the morning in question he was home along with a large group of his family members who were living with him. That's it. In response, the court said, "All right," and the jury was called to the courtroom. And Rabbi Kosofsky mostly stuck to this script.

- 18 - observations of pedestrian traffic on Converse Street. Here's

what happened. The government asked Kosofsky, "So, generally,

without regard to anything religious, what have you seen people do

on [the Converse Street] sidewalk?" Rathbun's counsel objected

and, at side bar, moved for a mistrial, arguing that the

government's very question -- specifically the "without-regard-

to-anything-religious" phraseology -- violated the court's

limiting instruction as it improperly suggested to the jury that

people actually partook of religious activities on Converse

Street, the exact inference the court had sought to avoid given

its potential risk of prejudice. Despite labeling the government's

question "unnecessary" and perhaps "gratuitous," the district

court denied Rathbun's motion for mistrial, concluding that the

statement was "not quite as problematic" as defense counsel argued

it to be. And the trial continued.

Before us, Rathbun reiterates the same evidentiary

protestations to Rabbi Kosofsky's testimony that he made below and

says the district court abused its discretion in allowing it.18

One exchange in particular screams unfairness, according 18

to Rathbun. In response to a general background question which laid the foundation for why Rabbi Kosofsky was often present at the JGS campus, Kosofsky testified, without objection, that he was a rabbi and regularly visited residents of JGS. Rathbun contends that permitting the Rabbi to offer this evidence about his pastoral duties at the JGS campus after the court had excluded evidence imputing religious bias increased the likelihood of the jury making an improper, unsupported, and prejudicial inference of religious bias. But because Rathbun failed to object, we would review this

- 19 - According to Rathbun, the government's conduct in soliciting what

Rathbun characterizes as religious-tinged testimony appeared to

have been an attempt to increase an unsupported theme of religious

bias because "[c]alling a rabbi who lived across the street from

the area where the container was found to describe neighborhood

characteristics and pedestrian traffic was cumulative,

unnecessary, and suggested religious targeting - a theme

irrelevant to the charges and unsupported by any evidence."

Alternatively, argues Rathbun, even if the testimony may

have had some marginal relevance, Rabbi Kosofsky's testimony

should have been excluded under Rule 403. That is so, he says,

because given the factual realities of this case, with its

attendant religious overtones, the probative value of his

testimony was substantially outweighed by the risk of unfair

prejudice, meaning it was far too prejudicial to justify its

usefulness.

The government counters, advancing its previous

arguments, and emphasizing that Rathbun's claim that the

government could have obtained equivalent, relevant testimony from

less prejudicial witnesses lacks merit. Focusing on Kosofsky's

asseveration for plain error. See United States v. Medina,

(1st Cir. 2005). However, Rathbun does not acknowledge the application of plain error here or offer a plain error analysis as to the evidence he now takes exception to, so his claim is waived. See United States v. Rodriguez-Monserrate,

, 40 (1st Cir. 2021).

- 20 - testimony about the Converse Street neighborhood, the government

argues that while other witnesses testified generally about the

area, Rabbi Kosofsky offered greater detail about the

neighborhood's distinguishing features based on his eleven years

of living and working on the street. Further, he described the

area from a civilian perspective as opposed to that of a

governmental first responder. That is important, says the

government, because it has the right to "prove its case by evidence

of its own choice," and it was not obligated to prove its case by

the barest evidence or most anodyne witness. Finally, the

government stresses that Rathbun cites no precedent to support his

notion that the district court should have declined to admit Rabbi

Kosofsky's testimony simply "because of the witness's [rabbinical]

position or background."

Before we tackle the arguments, a discussion of

evidentiary fundamentals will be useful.

On the topic of relevance, we have said that "[r]elevancy

is a very low threshold" that only requires the tendered evidence

to "move the inquiry forward to some degree." United States v.

Cruz-Ramos,

, 42 (1st Cir. 2021) (citing Bielunas v.

F/V Misty Dawn, Inc.,

(1st Cir. 2010)). Rule 401

defines relevancy broadly as evidence having any tendency to make

the existence of any fact that is of consequence more or less

probable. Fed. R. Evid. 401. We have also held that to be

- 21 - relevant, the evidence need not definitively resolve a key issue

in the case, see, e.g., United States v. Rivera Calderón,

, 96-97 (1st Cir. 2009), it need only move the inquiry forward

to some degree, Bielunas,

(citing 2 Jack B.

Weinstein & Margaret A. Berger, Weinstein's Federal Evidence

§ 401.04[2][b] (Joseph M. McLaughlin ed., 2d ed. 2010)). Given

that relevancy is a quintessential judgment call, Morales

Feliciano v. Rullan,

(1st Cir. 2004), we "give

trial judges considerable leeway in deciding whether the contested

evidence satisfies this not-too-difficult-to-meet standard,

reversing only on a showing of abuse of discretion," Bielunas,

.

Regarding evidence thought prejudicial, Rule 403 permits

a trial judge to "exclude relevant evidence if its probative value

is substantially outweighed by a danger of . . . unfair

prejudice." Fed. R. Evid. 403. "Unfair prejudice 'speaks to the

capacity of some concededly relevant evidence to lure the

factfinder into declaring guilt on a ground different from proof

specific to the offense charged.'" United States v. DiRosa,

(1st Cir. 2014) (quoting Old Chief v. United States,

(1997)). As we've often stated, there is no

debate that the trial court judge possesses "considerable latitude

in Rule 403 rulings." United States v. King,

(1st Cir. 1987); see also United States v. Maldonado-Peña, 4 F.4th

- 22 - 1, 37 (1st Cir. 2021). Given such latitude, we have previously

held that "[t]he balancing act that the rule demands 'is a

quintessentially fact-sensitive enterprise, and the trial judge is

in the best position to make such factbound assessments.'" United

States v. Mare,

(1st Cir. 2012) (quoting Udemba v.

Nicoli,

(1st Cir. 2001)). In the past, we have

upheld as an appropriate discretionary call under Rule 403 the

exclusion of evidence that might present a danger of "certain

pitfalls, including . . . 'needlessly presenting cumulative

evidence.'" United States v. Mehanna,

(1st Cir.

2013) (quoting Fed. R. Evid. 403). As for evidence said to be

cumulative, we have noted that "[e]vidence is cumulative if

repetitive, and . . . 'the small increment of probability it adds

may not warrant the time spent in introducing it.'" Elwood v.

Pina,

(1st Cir. 1987) (quoting 1 Weinstein's

Evidence ¶ 401[07] at 401-47-48 (1985)). In reviewing these

evidentiary calls, "[w]e afford deference to the district court's

weighing of probative value versus unfair effect, only in

'extraordinarily compelling circumstances' reversing that 'on-the-

spot judgment' from 'the vista of a cold appellate record.'"

DiRosa,

(quoting United States v. Doe,

(1st Cir. 2013)). Such deference acknowledges that the

trial judge is better positioned to "assess the admissibility of

the evidence in the context of the particular case before it."

- 23 - Mehanna,

(quoting Sprint/United Mgmt. Co. v.

Mendelsohn,

(2008)).

With guiding principles in place, this is our take. Upon

our review of the record, we find that Rabbi Kosofsky's testimony

survives Rathbun's relevance and cumulative error arguments.

Indeed, we reject any implication flowing from Rathbun's argument

that it was error to admit the evidence of a relevant prosecution

witness, here the Rabbi, because of the religion of that witness.

As for Rathbun's grumbles about cumulativeness, the record before

us belies his assertions. While several witnesses, specifically

law enforcement and firefighters, testified generally about their

familiarity with Converse Street, the record shows that Rabbi

Kosofsky, a long-term resident of the neighborhood, provided new

and pertinent factual detail, based upon his direct personal

knowledge of the setting, that other testifying witnesses did not

offer, all of which was germane to the intimidation component of

the government's case. Kosofsky described his home's proximity to

the JGS campus and expounded upon the pedestrian and vehicular

traffic on Converse Street. He furnished many more particularities

about the characteristics of the community and the specific areas

where the fuel container was found. Rabbi Kosofsky's detailed

recitation allowed the jury to garner greater insight into the

targeted area and to gain a greater understanding of the

foreseeable dangers posed by the fuel container, had it, indeed,

- 24 - exploded in this highly trafficked neighborhood, all of which

assisted the government in meeting its evidentiary burden of

proving the charged offenses. And although Rathbun can point to

some duplicative testimony about the Converse Street neighborhood,

the record clearly shows that Rabbi Kosofsky's testimony presented

expanded details which allowed the government to "tell[] a colorful

story with descriptive richness" and "not just to prove a fact but

to establish its human significance." Old Chief,

;

United States v. Munoz-Franco,

(1st Cir. 2007)

(finding that, "[a]lthough appellants can point to instances in

which the same story was told more than once, such repetition often

encompassed new and relevant details, and was not unduly frequent

given the complexity of the violations alleged and the length of

the trial").19

As for Rathbun's remonstrations about unfair prejudice,

we believe the district court's rationale for admitting Rabbi

Kosofsky's testimony, as we previously discussed, fairly balanced

the parties' competing evidentiary interests. As the government

rightly notes in response to Rathbun's suggestion that Kosofsky's

19 With respect to Kosofsky's snippet of testimony regarding his pastoral visits at the JGS campus which Rathbun says improperly injected inflammatory religious rhetoric into the trial, as the government points out, its introduction provided the jury with context as to why he was routinely in the area where the contrivance was found. Regardless, we deem any challenge to this evidence waived.

- 25 - testimony was too religiously tinged to avoid prejudice, Rathbun

fails to cite to any precedent (and we have found none) suggesting

that a district court should exclude a witness's relevant testimony

because of the testifier's background, position, or religious

affiliation. To be clear, Rathbun's postulation that the

government could not use such a witness because he was Jewish or

because the jury may have necessarily known him to be a Rabbi is

simply wrong. Further, we reject Rathbun's argument, murky at

best, that the use of this witness injected religious bias into

this case or was suggestive of an anti-Semitic motive.

Aside from our rebuff of Rathbun's misguided religious

animus approach, his argument fails to sufficiently credit the

precautionary measures the district court thoughtfully undertook

to carry out what it viewed as its Rule 403 balancing

responsibilities. Those precautions limited Rabbi Kosofsky's

testimony to avoid as much as possible any perceived unfair

inference that Rathbun's actions were motivated by religious bias

or anti-Semitism.20 That said, even with those carefully crafted

evidentiary limitations, the parties and the district court

acknowledged that religious threads were unavoidably woven

20 As noted, the district court excluded evidence about the religious practices or beliefs of pedestrians on Converse Street or the presence of other Jewish institutions on Converse Street. Additionally, as previously mentioned, at trial, the parties and the court simply referred to Rabbi Kosofsky as Mr. Kosofsky to avoid any potential suggestion of religious bias to the jury.

- 26 - throughout the basic fabric of the case's tapestry. But as we

have been wont to repeatedly point out in addressing Rathbun's

challenges, such were the nature and circumstances of this case.

On appeal, we see no reason to disrupt the district court's

evidentiary determination. See United States v. Varoudakis,

(1st Cir. 2000) (noting that the district court's

rulings on Rule 403 determinations are given great deference);

United States v. Hadfield,

(1st Cir. 1990).21

Accordingly, we conclude that the district court did not abuse its

discretion in admitting Rabbi Kosofsky's testimony.

b. BGEA Officers

Again, we first lay out the relevant procedural history

associated with the BGEA officers' testimonies before turning to

Rathbun's arguments. Prior to the start of the first trial, the

government filed a motion in limine seeking to introduce the

testimony of two BGEA officers -- Hill, the Director of Data

21 Furthermore, even if we were to assume arguendo that the district court abused its discretion in admitting Rabbi Kosofsky's testimony (and to be clear, we do not believe it did), there is no indication that Rabbi Kosofsky's disputed testimony affected the outcome of the trial in any way in light of the strength of the incriminating evidence pointing to Rathbun's culpability (think DNA evidence on the device). See Munoz-Franco,

(concluding that there was "no indication" that "the arguably cumulative nature of the evidence affected the outcome of the trial in any way"); see also Maldonado-Peña, 4 F.4th at 37 (also concluding that the appellant failed to show prejudice resulting from arguably cumulative testimony when the appellant failed to show that the cumulative evidence affected the outcome of his trial).

- 27 - Management and Analysis at BGEA; and Rhoads, the Vice President of

Church Ministry at BGEA. The gist of its reasoning was that the

BGEA officers' testimony was probative of whether Rathbun had

indeed committed the crime because it would help explain how pages

of the Steps to Peace With God tract, bearing Rathbun's blood,

became a wick in the fuel container.22 Rathbun, responding with

his own in limine motion objecting to the government's proffer,

stressed and opined that the evidence lacked relevance, was unduly

time consuming, risked confusion, and was unfairly prejudicial to

him.

The district court ruled that it would allow evidence

about the origin and distribution of the Steps to Peace With God

tract, including evidence explaining the role the Steps to Peace

With God tract played in the BGEA Northeast Tour. However, in

order to avoid confusion and possible prejudice, the court excluded

evidence of the tract's religious purpose and of the BGEA's

doctrinal mission. Prior to Rathbun's second trial, the court

reaffirmed the parameters of its ruling.

When called to the stand, Hill gave testimony consistent

with the court's ruling and, of note here, further addressed the

organization's data collection and mailing practices. Hill

explained to the jury that, as evidenced by their completion of a

At this point in the proceeding, the government had not yet 22

abandoned its religious motivation theory.

- 28 - BGEA information form, company records showed that Rathbun's

parents had attended the BGEA's 2019 Decision America Northeast

Tour.23

Then Rhoads took the witness stand. Upon being

questioned, he delved into BGEA's Massachusetts events, including

specifics of the 2019 Decision America Northeast Tour, the support

needed to organize the events, the background story behind the

Steps to Peace With God tract, and how it was used during the tour.

Rhoads further explained that the BGEA hired Rowe, the pastor of

Heritage Baptist Church where Rathbun's parents were active

members, to help organize the main event of the Decision America

Northeast Tour, the "big event." He pointed out that the Steps to

Peace With God tract was given to "volunteers, counselors,

[planning] attendees, or some collection of that" and that Rowe

would have received two copies of the tract as a contractor.

However, as Rathbun emphasizes in his opening and reply briefs,

and as relevant to his appellate contentions, neither BGEA witness

gave testimony directly addressing how Rathbun's parents may have

come into possession of the tract.

On appeal, Rathbun argues that the district court abused

its discretion when it admitted Hill's and Rhoads' testimonies,

Hill further testified that the BGEA prints its tracts in 23

South Carolina. The government introduced testimony about the tract's origin to establish

(d)'s interstate commerce connection. See

(d).

- 29 - repeating the mantra that it was irrelevant and unfairly

prejudicial under Rules 401 and 403, respectively. Specifically,

Rathbun maintains that their testimonies about "the content of the

tract" and its proselytizing purpose as it related to the BGEA

Northeast Tour was irrelevant because it was immaterial to the

charges against him. Their testimonies, he contends, (1) did

nothing to identify Rathbun as the perpetrator, (2) did not go to

motive, and (3) did not provide relevant background or context

evidence. In Rathbun's view, and as consistent with his take on

Rabbi Kosofsky's testimony, the government called Hill and Rhoads

for the sole purpose of inserting a theme of religious bias into

the trial by suggesting that Rathbun was motivated by prejudice,

even though the government had no evidence connecting him to any

anti-Semitic or white supremacist views or organizations.

Not so, says the government. It argues that the district

court's evidentiary determinations were correct and should be

affirmed because Hill's and Rhoads' foundational testimonies

credibly revealed how the religious tract landed in New England in

the first place, thereby, and along with other evidence (such as

Sheila's computer files), explaining, circumstantially, how

Rathbun may have gotten hold of the tract via his parents'

involvement with planning and attending the tour. Moreover, Hill's

and Rhoads' testimonies, says the government, were also admissible

because they significantly undermined one of Rathbun's adroit

- 30 - defense theories which -- by the way -- the jury clearly didn't

buy.24

To remind, we review Rathbun's preserved challenges

relative to the BGEA officers' testimonies for abuse of discretion,

Occhiuto,

, and given the deference we afford the

district court's ruling "only rarely and in extraordinarily

compelling circumstances will we . . . reverse a district court's

on-the-spot judgment concerning the relative weighing of probative

value and unfair effect," Nicoli,

.

As previously noted, the Federal Rules of Evidence

establish a low bar for relevance and that is our starting point.25

24 The theory went something like this: When opting to testify, in his own defense, Rathbun eventually acknowledged that he had earlier and likely found the yellow canister used to make the bomb at a job "cleanout" in Chicopee, Massachusetts. At that job site, he had cut his hand on a metal shard, which explains the presence of his blood on the container. He contended that he (and an acquaintance) had illegally dumped the cleanout debris at a dumpster on Converse Street some days before the bomb was found. As for the bloody tract, he theorized that blood from his cut must have somehow transferred to a pamphlet he speculates his mother must have had in her car's cup holder, and that the pamphlet must have gotten jettisoned to the dumpster along with the fuel canister and other random debris. Continuing, he postulates some random third person -- someone very careful not to leave fingerprints, but crafty enough to leave incriminating blood evidence -- must have come along and fished the canister and the pamphlet out of the dumpster and used it to craft the destructive firebomb at the heart of this prosecution. As we said, this alternative explanation was seemingly a non-starter for the jury. 25 See, e.g., Cruz-Ramos, 987 F.3d at 42. And we have previously held that "[a] relevancy-based argument is usually a tough sell." Bielunas,

; see also Cruz-Ramos, 987 F.3d at 42. As noted above, Rule 401 defines relevancy broadly as

- 31 - From our record review, it is clear that the evidence offered by

Hill and Rhoads was relevant and probative "on the government's

proof of identity" burden because, as the government contends,

their testimonies constituted circumstantial evidence

demonstrating Rathbun's potential access to the Steps to Peace

With God tract through his parents' involvement with the BGEA.

And it further helped explain how Rathbun could have committed the

crime as a reasonable jury could have concluded that Rathbun had

crafted the crude incendiary device using everyday items he had

gathered in his personal environment (his home and his mom's car),

to wit, the yellow fuel can and the tract.26

As we held in United States v. Charles, "[e]vidence that

pertains 'to a chain of events forming the context . . . and set-

evidence having any tendency to make the existence of any fact that is of consequence more or less probable. Fed. R. Evid. 401. 26In other words, a jury could reasonably infer that because Rathbun's parents had close proximity to the pamphlet or to people who had access to the pamphlet, and because they, more probably than not, brought the pamphlet home, and because Rathbun must have found the Steps to Peace With God pamphlet somewhere in his personal vicinity, it reasonably followed that Rathbun had taken and used the tract in putting together his homemade explosive device (as evidenced by his DNA being found on the tract and canister). And although Sheila testified she had never seen the pamphlet before the government's investigation began, the jury was not required to accept that rendition, particularly in the face of contradictory evidence. See United States v. Alfonzo-Reyes,

(1st Cir. 2010) ("Direct evidence is not required to find [a defendant] guilty, and juries are entitled to draw reasonable inferences at trial based on circumstantial evidence.").

- 32 - up of the crime, helping it to complete the crime on trial . . .

[is admissible in appropriate cases] . . . where it possesse[s]

contextual significance.'"

(1st Cir. 2006)

(alteration in original) (citations omitted). As in Charles, the

information here provided by Hill and Rhoads was relevant to the

chain of events in this case because it explains why Rathbun's

tenable access to the tract made him a culpable suspect in the

commission of the crime. See

We further conclude that evidence regarding the Steps to

Peace With God tract did not unfairly prejudice Rathbun, in spite

of his Rule 403 objection asserting that the tract's introduction

inserted confusion and a theme of religious animus into the trial

and appealed to the jury's emotion. In the instant case, we

necessarily reiterate: The facts are what they are -- there is no

denying that the tract itself, an objective piece of direct

evidence against Rathbun given his blood on the document, was a

proselytizing piece of literature distributed by the BGEA. But as

the jury undoubtedly concluded, it is Rathbun who chose the tract

as his weapon of choice for arming the explosive device. Moreover,

the district court, ever sensitive to the evidence's inescapable

religious overtones, and ever mindful of the need (at least as the

district court sussed out the issues) to avoid infusing religious

bias into the trial, clearly and appropriately balanced the

probative value of Hill's and Rhoads' testimonies against the risk

- 33 - of unfair prejudice in admitting this evidence. And to eschew any

hypothetical prejudice flowing to Rathbun from its admission, the

district court took reasonable steps to adequately limit the

information provided to the jury about the Steps to Peace With God

tract to testimony confining the scope of the evidence to its

relationship to the BGEA Northeast Tour. See United States v.

Benitez-Avila,

(1st Cir. 2009). Then, once both

Hill and Rhoads had concluded their testimonies, it immediately

provided an unobjected to, focused, limiting instruction

explaining to the jury that the testimonies related strictly to

the tract's possible availability to Rathbun, not to its content.

Specifically, in its limiting instruction, the court stated:

Ladies and gentlemen, relative to the testimony that you have heard regarding what has been called tract-type materials, the purpose of these materials, the reason why they -- there's been talk about them and they have been introduced. The purpose is for you to know where these materials came from, any individual's access or potential access to these materials, the availability when, where, or how to these types of materials, that's what they're admissible for.

There's really no relevance or admissibility for the content when you read them. The religious message that's being delivered, that's not an issue right here. So anything that's written inside of them is not really the issue as I said. It's the availability. Who had access to them, where were they, how would someone get them is why these are being talked about here. All right? I just want to make sure that that's understood. All right. Thank you.

- 34 - Accordingly, we fail to see how Hill's and Rhoads' probative

testimonies about the tract used as a wick should be reasonably

viewed as unfairly prejudicing Rathbun, and therefore see no abuse

of discretion in the district court's decision to admit it. See

United States v. Vest,

(1st Cir. 1988)

(concluding that the district court properly limited any

prejudicial effect of the evidence in question when it issued a

limiting instruction).

c. The Cumulative Effect of the Testimonies and the Government's Opening and Closing Arguments

Next, Rathbun advances what appears to be an amorphous,

standalone protestation, targeting the cumulative effect of the

admittance of several pieces of contested evidence in combination

with statements made by the prosecutor. This is how Rathbun frames

his argument in his opening brief:

While Rathbun maintains that the probative value of the testimony of Rabbi Kasofsky [sic] and the BGEA witnesses, considered individually, was substantially outweighed by the risk of unfair prejudice, he submits that the risk of unfair prejudice from the religious themes was heightened by the combination of those three witnesses and exacerbated by the government's repeated contrast of the "Christian religious tract" and the "Jewish nursing home" [(in its opening and closing arguments)] -- notwithstanding its concession that it had no evidence of an anti- Semitic motive.

- 35 - At the outset, we note that Rathbun and the government

are ships passing in the night when it comes to a common

understanding of what Rathbun is challenging here. The government

does not seem to understand that Rathbun is making a cumulative

effect argument and thus does not address it as such in its

briefing. Instead, given the emphasis Rathbun, in his opening

brief, places on statements made by the government during its

opening and closing remarks, the government interprets Rathbun as

solely advancing a prosecutorial misconduct claim of error.

Therefore, the government addresses only that understanding of

Rathbun's argument and, consistent with that interpretation,

denies that it ever engaged in prosecutorial misconduct.

In retort, Rathbun's reply brief makes clear that the

government's understanding of his argument totally misses the

mark. He says:

Mr. Rathbun argued that the government's juxtaposition of the Christian tract and the Jewish nursing home in its opening and closing arguments illustrated and heightened the potential for unfair prejudice from the government's presentation of Kasofsky [sic] and the BGEA witnesses. Yet, the government's response . . . focuses on an argument not made -- that prosecutorial misconduct in closing argument required a new trial — and argues that Mr. Rathbun has not shown that the prosecutor's argument was plainly erroneous. However, the issue is whether the testimony of Chaim Kasofsky [sic] and the BGEA witnesses was unfairly prejudicial and requires a new trial . . . . The totality of the religious

- 36 - motivation evidence and argument produced the unfair prejudice requiring a new trial.

Ships passing . . .27

All that said, we can dispose of Rathbun's claim of error

with easy dispatch.28 Our review of the record makes clear that

Rathbun did not make this cumulative effect argument in the

district court pursuant to a Rule 29 motion for judgment of

acquittal or new trial. What's more, Rathbun's briefing does not

spell out what standard of review he wants us to apply to his

challenge here, and that is so in spite of his legal obligation to

so advise.29 See Fed. R. App. P. 28(a)(8)(B) (instructing that,

for each issue, the argument must contain a concise statement of

27As for our parsing of Rathbun's argument, we believe, for what it's worth, that it boils down to this. Highlighting the testimonies of Rabbi Kosofsky and the BGEA officers, Rathbun maintains that the questioning of these witnesses is indicative of the impermissible theme of anti-Semitism which he says permeated the government's case. In his view then, it is the cumulative effect of the religiously charged testimonial language which Rathbun claims drew excessive attention to unsupported religious themes, coupled with certain religiously tinged statements the government made during its opening and closing remarks, that unfairly prejudiced him, thereby depriving him of a fair trial. Regardless of our understanding, the argument is waived. 28 To be clear, the claim of error we'll tackle here is Rathbun's cumulative effect argument, not the prosecutorial misconduct argument the government understood him to be making -- an argument which Rathbun explicitly says in his reply brief is "an argument not made." 29It is telling to us that while Rathbun's opening brief is clear that abuse of discretion analysis guides our review of his other appellate challenges, it is dead-silent on what standard of review should apply to his cumulative effect argument.

- 37 - the applicable standard of review). In view of the procedural and

substantive confusion with which we are confronted in our efforts

to understand Rathbun's appellate challenge, at best, we would

review his cumulative effects argument for plain error. See United

States v. Pérez-Vásquez,

, 201 (1st Cir. 2021).

However, cutting to the chase, because Rathbun does not acknowledge

his failure to preserve his objection below or provide us with a

plain error analysis of his cumulative effect argument in his

opening brief, the argument is waived, and we need say no more.

See Rodriguez-Monserrate, 22 F.4th at 40 (reasoning that a

defendant's failure to address the four-part plain error standard

in seeking review of an unpreserved argument violates the rules of

procedure, waiving the argument); see also United States v.

Vázquez-Rosario,

, 571 (1st Cir. 2022) (concluding an

appellant's claim was waived when the appellant did not address

the applicable standard of review); United States v. Pabon,

(1st Cir. 2016) ("Pabon has waived these challenges

because he has not even attempted to meet his four-part burden for

forfeited claims . . . ."). And to the extent more is needed here

(which it isn't), we'd note that even if Rathbun's failure to map

his arguments onto the demanding plain error rubric wasn't enough,

we would deem the argument he's trying to make here too

"confusingly constructed and thus waived." See Págan-Lisboa v.

- 38 - Soc. Sec. Admin.,

, 7 (1st Cir. 2021) (quotation marks

omitted).

In wrapping up our discussion of Rathbun's first set of

protestations over prosecutorial witnesses, we make clear that our

careful treatment of Rathbun's objection to "religious" evidence

does not suggest that the issue is a close one. A facility

prominently associated with the Jewish faith was the target of a

firebombing attempt by a bomber who left behind a Christian

religious tract. Given such a crime, calling as a witness the

local rabbi to testify about relevant facts, or providing evidence

of Rathbun's potential access to the tract used as a fuse, hardly

begins to qualify as unfairly prejudicial.

II. Evidence of Rathbun's Drug Use in the Motel

Next, we address Rathbun's arguments relative to his

Rule 404 propensity objection. Prior to trial, the government

filed a motion in limine seeking to introduce newly developed

evidence about Rathbun's mental state during the timeframe leading

up to the crime. Specifically, the government sought to introduce

evidence about Rathbun's then-recent job termination and about a

drug binge which occurred at a Quality Inn motel in Chicopee,

Massachusetts (the "Motel") on March 3, 2020, about a month before

the fuel container was found outside the JGS campus. The

government sought to do so to provide the jury with a more accurate

and complete picture of Rathbun's life circumstances and state of

- 39 - mind leading up to the crime (we'll get to the discussion of this

information in just a moment). Over Rathbun's opposition, the

district court partially granted the government's motion,

concluding that testimony about Rathbun's drug binge at the Motel

was admissible because it would shed light on his state of mind

while under the influence of drugs.30

At trial, over Rathbun's objections, the government

introduced the testimonies of Chicopee Police Officer Peter Szufa

("Officer Szufa") and Dana Graham ("Graham"), who both interacted

with Rathbun at the Motel on March 3, 2020. Officer Szufa

testified that he was on duty that evening when he responded to a

larceny-in-progress call at the Motel. When he arrived at the

scene, he observed a van matching the description of the one in

the dispatch call but did not see anyone in it or observe any signs

of forced entry. Instead, he noticed Rathbun shouting from the

second floor of the Motel that someone was in the front seat of

his van. Officer Szufa further testified that Rathbun came

downstairs to speak with him wearing only shorts, which he found

peculiar given the evening's cold temperature. He explained that

Rathbun could not provide a logical account of his claim -- that

30 The court denied the government's motion with respect to testimony about Rathbun's job loss, reasoning that the specific examples of his poor work performance were cumulative bad acts and character evidence with slight probative value in determining Rathbun's motive or intent in placing the gas container at the JGS campus.

- 40 - the burglar had entered his van, left, and came back again -- and

that he found no corroborating evidence to support Rathbun's

assertion.

Next, Graham, Rathbun's friend and a former substance

abuser, testified that she was with Rathbun at the Motel on the

evening of March 3, 2020. She told the jury that they both binged

drugs that evening, taking a combination of alcohol, cocaine,

heroin, crack cocaine, and Xanax that left Rathbun erratic, jumpy,

and suspicious. She said she did not see anyone enter Rathbun's

van. Following Graham's testimony, the district court instructed

the jury that it could consider the evidence related to Rathbun's

behavior at the Motel only for the limited purpose of understanding

Rathbun's life around the time of the alleged incident, including

his personal life, employment status, state of mind, and general

well-being.

On appeal, Rathbun argues that the district court abused

its discretion when it admitted evidence of his behavior during

his drug binge at the Motel, a month before the incident, as

relevant to his state of mind on April 1, 2020, the night before

the crime, when he also took drugs. More specifically, Rathbun

contends that the evidence was rank propensity evidence improperly

suggesting that because he acted erratically at the Motel after

taking drugs, he also acted erratically on April 1, the night

before the crime, when he took crack cocaine. Rule 404 should

- 41 - have precluded its admissibility, Rathbun says. Rathbun further

argues that the evidence lacked special relevance under Rule 404

because (1) there was no evidence that he ingested the same drugs

on April 1, 2020, as he did at the Quality Inn on March 3, 2020;

and (2) the Motel incident failed to provide any relevant context

to the jury because his drug use and addiction were uncontested at

trial. Moreover, he maintains that the evidence should have been

excluded because even if of some relevance, its probative value

was substantially outweighed by the risk of unfair prejudice.

Unsurprisingly, the government disagrees. The

government first argues that the evidence was likely admissible as

"intrinsic evidence" (a concept we'll explain momentarily) because

the Motel incident was referenced during testimony provided by

Sheila and John Rathbun and Rathbun's teenage daughter and it was

relevant to show "Rathbun's mental state in the period leading up

to and continuing through the night of April 2d [sic]."

Regardless, the government maintains that the evidence was

admissible under Rule 404(b) because it provided a motive for

Rathbun's crime, to wit, "that, during this time period and

especially when using drugs, Rathbun might have acted out based on

his agitation and frustration with his life circumstances" and

behaved in unpredictable ways, all of which negated Rathbun's

assertion that he did not possess any intent to commit the crime

because he harbored no animus against the target. Second, the

- 42 - government contends that the district court properly balanced Rule

403 when it admitted the evidence because the probative value of

Officer Szufa's and Grahams' testimonies substantially outweighed

the risk of unfair prejudice. The government also asserts that

the risk of unfair prejudice was low because it never argued during

the trial that Rathbun acted similarly to his behavior at the Motel

when he took drugs on April 1, 2020.

Before we tackle the necessary analysis and the lens

through which we'll address Rathbun's arguments, we start with

first principles of Rule 404.

Rule 404 prohibits evidence of a defendant's other

crimes, wrongs, or acts to show a defendant's propensity to act in

a particular way. Fed. R. Evid. 404(b)(1). However, such evidence

may be admitted for another purpose, such as showing "motive,

opportunity, intent, preparation, plan, knowledge, identity,

absence of mistake, or lack of accident." Fed. R. Evid. 404(b)(2).

We have held that this list is illustrative, not exhaustive. See

United States v. Landry,

(1st Cir. 2011). As

such, the rule is one of inclusion, since one purpose is

prohibited, and many others are permitted. See United States v.

Rodríguez-Soler,

(1st Cir. 2014); see also United

States v. Zeuli,

(1st Cir. 1984). "Extrinsic"

and "intrinsic" evidence are concepts associated with Rule 404.

Rodríguez-Soler,

; United States v. Green, 698 F.3d

- 43 - 48, 55 (1st Cir. 2012). We have held that, "[b]y covering only

evidence of a person's 'other crimes, wrongs, or acts,' the rule

draws a line between prior acts that are part of the charged crime

[intrinsic evidence] and those that are not [extrinsic evidence]."

Rodríguez-Soler,

(emphasis in original); see also

United States v. Bowie,

(D.C. Cir. 2000); United

States v. Shea,

(1st Cir. 1998).31

Because Rathbun objected to the admission of the

prior-bad-acts evidence at trial, we would ordinarily ask whether

the district court's ruling was an abuse of discretion. See United

States v. Gemma,

(1st Cir. 2016); see also United

States v. Henry,

(1st Cir. 2017). However, an answer

to this question does not complete our inquiry. For purposes of

our analysis, we further ask -- even if we assume arguendo that

the admitted evidence might possibly be viewed as impermissible

propensity evidence (and to be clear, we do not believe it was

propensity evidence) -- whether it was harmless. That is so

because if admission of the challenged evidence was harmless, we

do not reverse. United States v. Kilmartin,

, 338

(1st Cir. 2019) (noting "[a]n [evidentiary] error will be treated

as harmless only if it is 'highly probable' that the error did not

contribute to the verdict" (quoting Fulmer,

));

31The government's alternative argument suggesting that this evidence may be intrinsic is one we need not reach.

- 44 - United States v. Landrón-Class,

(1st Cir. 2012)

("[E]ven if [an evidentiary] error occurred, it would not serve to

overturn a conviction if it ultimately proved harmless."); United

States v. Pridgen,

(1st Cir. 2008) (noting that a

defendant's verdict will not be overturned if "it is highly

probable that the [evidentiary] error did not affect the verdict").

To analyze whether an error was harmless, we must analyze from

"the record as a whole . . . the probable impact of the improper

evidence upon the jury." Fulmer,

. In doing so,

we consider factors such as "the centrality of the tainted

material, its uniqueness, its prejudicial impact, the uses to which

it was put during the trial, [and] the relative strengths of the

parties' cases." Kilmartin, 944 F.3d at 338 (quoting United States

v. Piper,

(1st Cir. 2002)). In a criminal case,

the crucial factor is typically "the strength or weakness of the

government's evidence of guilt" less the improperly admitted

evidence. Id.; see also United States v. García-Sierra,

, 35 (1st Cir. 2021).

The government maintains that any error in admitting the

Motel evidence was harmless because it presented a solid, robust

case against Rathbun. On the other hand, Rathbun says admission

of the evidence was clearly not harmless and as proof he contrasts

the outcome of the first trial where the Motel evidence was not

offered -- a hung jury on Counts One and Two -- with the outcome

- 45 - of the second trial where the Motel evidence was allowed -- a

guilty finding on both counts. Urges Rathbun, given that the

government's evidence in both trials remained substantially the

same, save, primarily, for the introduction of this prior drug use

at the Motel, "it cannot be said it was highly probable the errors

did not contribute to the verdict."

After our review of the record, we conclude the

government has the better argument -- that is, even if the

admission of the prior-bad-acts evidence may have been error, it

was harmless. Contrary to Rathbun's protestations, the record

shows that abundant evidence incriminated him, making the

government's case against Rathbun quite strong. The government

presented evidence, inter alia, about the fuel container itself

and the recorded incriminating statements Rathbun made to his

mother acknowledging his possession of it, Rathbun's cell phone

location data on the date of the incident, Rathbun's DNA evidence

from the fuel container and wick, and Rathbun's inculpatory

admissions to investigators. The government also presented

circumstantial evidence demonstrating Rathbun's access to the

Steps to Peace with God tract and evidence that contradicted

multiple statements Rathbun made during his interview with Agent

McGonigle. Therefore, taking "the strength . . . of the

government's evidence of guilt" less the evidence of Rathbun's

behavior at the Motel, we conclude that the admission of the

- 46 - evidence, even if error, was harmless. Kilmartin, 944 F.3d at

338.

We also note that the evidence of Rathbun's behavior at

the Motel was not central to the government's case or, as we've

discussed in the past, an especially unique piece against Rathbun.

Id. (noting that courts consider the centrality of the tainted

materials, and the uniqueness of those materials, amongst other

factors). Presentation of this evidence was brief and factual,

the government advanced no overt propensity argument relative to

it, the government made no mention of it during its opening and

closing statements, and the court's limiting instruction (Motel

evidence admitted only to facilitate an understanding of Rathbun's

life and state of mind around the time of the alleged incident)

cabined how the jury could consider it. In our viewing of the

record as a whole, we cannot conclude that the Motel evidence was

a game-changer favoring guilt. In other words, we conclude that

it is highly probable that the admission of evidence pertaining to

Rathbun's behavior at the Motel in March 2020 was not a

determinative factor in the jury's guilty verdict. See García-

Sierra, 994 F.3d at 35-36 (concluding that the district court's

admission of a defendant's prior-bad-acts evidence was harmless

because the government's case was strong, and that it was "highly

probable" that the admission of the prior-bad-acts evidence was

not a determinative factor in the jury's guilty verdict). Nor is

- 47 - it true that the only difference between the two trials was the

admission of this evidence, as Rathbun alleges. In addition to

the challenged Motel evidence, we note the second trial, unlike

the first, premiered Rabbi Kosofsky's testimony which we've

already addressed and deemed appropriate. Another example, at the

second trial, Horace Williamson, the owner of the home at which

Rathbun cleared out trash sometime in the weeks before the day of

the bombing, testified as a rebuttal witness that he never owned

nor threw out a yellow gas canister or biblical tract, and that he

did not see Rathbun cut his hand or bleed at his home. Williamson's

testimony thus undercut Rathbun's theory as to how his DNA ended

up on those objects.

III. Cumulative Error

Finally, Rathbun makes a separate and distinct, last-

ditch, kitchen sink, cumulative error argument. Contending that

in addition to the evidentiary missteps with Rabbi Kosofsky and

the BGEA witnesses, and the inappropriate injection of religious

bias throughout the trial (and especially during the government's

opening and closing statements), if one then throws into that

concoction the wrongly admitted propensity evidence, what you get

is a series of errors that, in sum, constitute a bridge way too

far, necessitating reversal and new trial. We have previously

accepted "that the cumulative prejudicial effect of independently

innocuous trial errors may warrant a new trial." Id. at 36; see

- 48 - also, e.g., United States v. Peña-Santo,

(1st

Cir. 2015) ("[I]ndividual errors, insufficient in themselves to

necessitate a new trial, may in the aggregate have a more

debilitating effect."). However, we find each of the alleged

evidentiary errors to either not be errors at all or, if so,

harmless ones; we also find that they collectively do not warrant

a new trial. García-Sierra, 994 F.3d at 35-36 (concluding that a

new trial was not warranted because each of the defendant's

individual evidentiary errors were harmless and therefore

collectively, they were also harmless).

C. FINAL WORDS

For the foregoing reasons, we affirm.

- 49 -