Gladstone v. Tarrin

Appellate Case: 25-1423 Document: 33-1 Date Filed: 08/18/2026 Page: 1 FILED United States Court of Appeals UNITED STATES COURT OF APPEALS Tenth Circuit FOR THE TENTH CIRCUIT August 18, 2026 _________________________________ Christopher M. Wolpert Clerk of Court STEPHEN THEODORE GLADSTONE, Plaintiff - Appellant, v. No. 25-1423 (D.C. No. 1:25-CV-01355-CNS-KAS) KRISTEN TARRIN, (D. Colo.) Defendant - Appellee. _________________________________ ORDER AND JUDGMENT * _________________________________ Before MATHESON, CARSON, and ROSSMAN, Circuit Judges. _________________________________ Stephen Gladstone, proceeding pro se, appeals the district court’s dismissal of his civil rights complaint against Kristen Tarrin for lack of subject matter jurisdiction.

After examining the briefs and appellate record, this panel has determined * unanimously that oral argument would not materially assist in the determination of this appeal. See Fed. R. App. P. 34(a)(2); 10th Cir. R. 34.1(G). The case is therefore ordered submitted without oral argument. This order and judgment is not binding precedent, except under the doctrines of law of the case, res judicata, and collateral estoppel. It may be cited, however, for its persuasive value consistent with Fed. R. App. P. 32.1 and 10th Cir. R. 32.1.

Appellate Case: 25-1423 Document: 33-1 Date Filed: 08/18/2026 Page: 2

Exercising jurisdiction under 28 U.S.C. § 1291, 1 we affirm on the alternative ground that the amended complaint failed to state a claim. 2 I. BACKGROUND Ms. Tarrin served as a court-appointed child legal representative (CLR) for Mr. Gladstone’s son in a state court child custody case. Mr. Gladstone sued her under 42 U.S.C. § 1983, alleging that, in the state custody case, “[s]he submitted reports based on hearsay, committed perjury, omitted favorable evidence, and moved to quash subpoenas seeking evidence of therapist misconduct and maternal abuse.”

R. vol. 1 at 94. He claimed that her actions caused him to lose “all parenting time” and his son to suffer emotional harm. Id. at 97. He also alleged Ms. Tarrin acted “under color of state law.” Id. at 94, 96. The amended complaint said the district court had jurisdiction under 28 U.S.C. § 1331.

Ms. Tarrin moved to dismiss Mr. Gladstone’s claims under Federal Rule of Civil Procedure 12(b)(1) for lack of subject matter jurisdiction and under Rule Appellate Case: 25-1423 Document: 33-1 Date Filed: 08/18/2026 Page: 3

12(b)(6) for failure to state a claim. The district court granted the motion under Rule 12(b)(1) because Ms. Tarrin was not a state actor. It dismissed Mr. Gladstone’s case without prejudice, denied leave to amend, and denied as moot his pending motions.

This appeal followed.

II. DISCUSSION “We review a dismissal for lack of subject matter jurisdiction under Federal Rule of Civil Procedure 12(b)(1) de novo.” Mukhtar v. Lambrecht, 172 F.4th 836, (10th Cir. 2026). We also review de novo whether a complaint has failed to state a claim under Federal Rule of Civil Procedure 12(b)(6). Cuervo v. Sorenson, 112 F.4th 1307, 1312 (10th Cir. 2024). “To survive a motion to dismiss [for failure to state a claim], a complaint must contain sufficient factual matter, accepted as true, to ‘state a claim to relief that is plausible on its face.’” Ashcroft v. Iqbal, 556 U.S. 662, 678 (2009) (quoting Bell Atl. Corp. v. Twombly, 550 U.S. 544, 570 (2007)).

“To state a claim under § 1983, a plaintiff . . . must show that the alleged deprivation was committed by a person acting under color of state law.”

West v. Atkins, 487 U.S. 42, 48 (1988). 3 The defendant must “have exercised power Appellate Case: 25-1423 Document: 33-1 Date Filed: 08/18/2026 Page: 4 possessed by virtue of state law and made possible only because the wrongdoer is clothed with the authority of state law.” Id. at 49 (internal quotation marks omitted).

Mr. Gladstone’s complaint failed to satisfy the “under color of state law” element.

In Polk County v. Dodson, 454 U.S. 312, 325 (1981), the Supreme Court held that “a public defender does not act under color of state law when performing a lawyer’s traditional functions as counsel to a defendant in a criminal proceeding.” In Meeker v. Kercher, 782 F.2d 153 (10th Cir. 1986) (per curiam), we extended Polk County to hold a guardian ad litem exempt from § 1983 liability. See id. at 155 (“[T]he reasoning of Polk County applies with equal force to a guardian ad litem representing a minor in a state proceeding on a petition alleging abuse or neglect.”).

Mr. Gladstone does not distinguish how a CLR differs from a guardian ad litem for purposes of a § 1983 action. Like a guardian ad litem, a CLR “is a fiduciary who must act in the minor’s best interest.” Id. (internal quotation marks omitted); see also Colo. Rev. Stat. § 14-10-116(2)(a) (“The legal representative of the child . . . shall represent the best interests of the minor or dependent child . . . .”). Ms. Tarrin thus “owe[d] . . . her undivided loyalty to the minor, not the state.” Meeker, 782 F.2d at 155.

Mr. Gladstone relies on Dennis v. Sparks, 449 U.S. 24, 27–28 (1980), and Lugar v. Edmondson Oil Co., 457 U.S. 922, 941 (1982), to argue Ms. Tarrin was law, suit in equity, or other proper proceeding for redress ....

Appellate Case: 25-1423 Document: 33-1 Date Filed: 08/18/2026 Page: 5 a state actor because she functioned as “a court-appointed representative who jointly initiate[d], influence[d], and perpetuate[d] law-enforcement action.”

Aplt. Opening Br. at 11. But his amended complaint did not rely on this joint action theory—he simply asserted that Ms. Tarrin’s CLR position made her subject to § 1983. And in Meeker, we held that “[i]t is of no consequence if, in the exercise of . . . her independent judgment on behalf of the minor, the guardian ad litem arrives at a position of advocacy which corresponds with the objectives of the state.” 782 F.2d at 155. This holding applies equally to Ms. Tarrin. Under Polk County and Meeker, Ms. Tarrin, a CLR, was not a § 1983 state actor.

The district court erred, however, in dismissing the amended complaint for lack of subject matter jurisdiction under Rule 12(b)(1). For jurisdiction, the amended complaint relies only on 28 U.S.C. § 1331, which confers “jurisdiction of all civil actions arising under the . . . laws of the United States.” Unlike 28 U.S.C. § 1343(a)(3), which grants district courts jurisdiction over civil rights actions “[t]o redress the deprivation, under color of any State law, statute, ordinance, regulation, custom or usage, of any right, privilege or immunity secured by the Constitution of the United States or by any Act of Congress providing for equal rights of citizens or of all persons within the jurisdiction of the United States” (emphasis added), § 1331 does not contain an “under color of state law” requirement for subject matter jurisdiction.

Because the amended complaint does not rely on § 1343(a)(3) for jurisdiction, and because Mr. Gladstone’s § 1983 claims “aris[e] under the . . . laws of the United Appellate Case: 25-1423 Document: 33-1 Date Filed: 08/18/2026 Page: 6

States,” he did not need to show state action for subject matter jurisdiction under § 1331. See Grapentine v. Pawtucket Credit Union, 755 F.3d 29, 32 n.1 (1st Cir. 2014) (“[A]lmost by definition, a claim under § 1983 arises under federal law and will support federal-question jurisdiction pursuant to § 1331.” (internal quotation marks omitted)).

But he still must show that Ms. Tarrin acted “under color of state law” as an element of his § 1983 claim. Elliott v. Chrysler Fin., 149 F. App’x 766, 768 (10th Cir. 2005) (“Ordinarily, § 1983 plaintiffs assert federal question jurisdiction under 28 U.S.C. § 1331, and the state action requirement is treated only as an element of the claim.”) (cited for persuasive value under Fed. R. App. P. 32.1; 10th Cir. R. 32.1). His amended complaint does not do so. It therefore should have been dismissed under Rule 12(b)(6) because it failed to allege that Ms. Tarrin acted under color of state law. We affirm the district court’s dismissal on this alternative ground, and remand for the district court to determine whether the dismissal should be with prejudice. 4

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III. CONCLUSION We affirm dismissal of the amended complaint because it fails to state a claim under Rule 12(b)(6). We deny Mr. Gladstone’s “Request for Judicial Notice” (Dkt. No. 24) and his “Motion for Judicial Notice of Related District Court Filings and Sworn Therapeutic Evidence” (Dkt. No. 29). We remand for further proceedings consistent with this order and judgment. 5 Entered for the Court

Scott M. Matheson, Jr. Circuit Judge