MEMORANDUM **

The appellants brought suit under 42 U.S.C. § 1983, claiming that the defendant police officers’ use of non-deadly and deadly force resulting in Rodney Sandberg’s death was unconstitutionally excessive. A jury trial commenced, and after both parties had rested, the appellees moved for judgment as a matter of law under Fed. R.Civ.P. 50(a). Even when the evidence was viewed in a light most favorable to the appellants, the district court found the officers’ actions were objectively reasonable and there was no legal basis on which appellants could prevail in their § 1983 claim. Accordingly, judgment as a matter of law was entered for the appellees under Rule 50(a). This appeal followed. We affirm. 1

*713 The appellants contend the district court erred in entering judgment as a matter of law under Rule 50(a) by concluding there was no legal basis on which a reasonable jury could find the defendant officers used unconstitutionally excessive force in violation of 42 U.S.C. § 1988. We review a district court’s entry of judgment as a matter of law under Fed.R.Civ.P. 50(a) de novo. Torres v. City of Los Angeles, 548 F.3d 1197, 1205-06 (9th Cir. 2008). All evidence must be viewed and all inferences must be drawn in favor of the non-moving party, and the evidence at trial must permit only one reasonable conclusion for the judgment to be affirmed. Id.

The constitutional violation alleged under 42 U.S.C. § 1988 is excessive force by law enforcement. “The reasonableness of a particular use of force must be judged from the perspective of a reasonable officer on the scene, rather than with the 20/20 vision of hindsight.” Graham v. Connor, 490 U.S. 386, 396, 109 S.Ct. 1865, 104 L.Ed.2d 443 (1989). A claimed violation of 42 U.S.C. § 1983 for use of excessive force is rooted in the Fourth Amendment’s protection against unreasonable searches and seizures. Id. at 394, 109 S.Ct. 1865.

The test of reasonableness under the Fourth Amendment ... requires careful attention to the facts and circumstances of each particular ease, including the severity of the crime at issue, whether the suspect poses an immediate threat to the safety of the officers or others, and whether he is actively resisting ar-reste.]

Id. at 396, 109 S.Ct. 1865. (Quotation and citations omitted). We have recognized that the threat posed to the officers and others is the most important factor in the Graham analysis. Chew v. Gates, 27 F.3d 1432, 1441 (9th Cir. 1994). “The calculus of reasonableness must embody allowance for the fact that police officers are often forced to make split-second judgments — in circumstances that are tense, uncertain, and rapidly evolving — about the amount of force that is necessary in a particular situation.” Graham, 490 U.S. at 396-97, 109 S.Ct. 1865.

The testimony given at trial and the audio recording of the incident reveal a chaotic scene that progressively deteriorated. When they arrived, the defendant officers were confronted with a suicidal man clutching a knife in a cramped mobile home with his family. Credible testimony was given that Sandberg was arguing with his family while in possession of the knife. The officers, who had been given conflicting details of the scene in separate 911 calls, were faced with a confusing — and dangerous — scene.

After removing the other occupants from the home, the officers used a taser in an attempt to subdue Sandberg, which proved tragically ineffective. While some may question the repeated use of the taser in hindsight, we cannot say that it was unreasonable police procedure. The audio recording reveals that Sandberg was growing increasingly desperate, that the situation was rapidly deteriorating, and that the officers had a legitimate reason to fear for their safety. Despite its later-proven ineffectiveness, the use of non-deadly force through taser shock was an objectively reasonable tactic to use to defuse the situation.

Additionally, there is no legal basis on which a reasonable jury could find that the officers’ use of deadly force was unconstitutionally excessive. Testimony from the officers and family members agree that Sandberg was constantly moving throughout the encounter, all the while holding a knife. Further, the audio recording reveals multiple comments from Sandberg indicating his desire for the po *714 lice to shoot him. After repeated commands of “shoot me” and “put me out of my misery,” Sandberg eventually taunted the officers asking if he has to charge them for them to finally open fire. The officers all agree that at some point, Sand-berg charged them, resulting in this tragedy. Under these severely escalating circumstances, the officers reasonably and understandably feared for their personal safety. There is no legal basis on which a reasonable jury could find that the use of deadly force was unconstitutionally excessive.

We sympathize with the tragic circumstances of this case. The actions of law enforcement are given deference, however, to the extent that we will not condemn reasonable tactical decisions with the benefit of hindsight. See Graham, 490 U.S. at 396, 109 S.Ct. 1865. Considering the unpredictable and dangerous situation confronted by the officers, no reasonable jury could find that their actions were unreasonable, and the district court was correct in entering judgment as a matter of law under Fed.R.Civ.P. 50(a).

AFFIRMED.