Thomas v. Bruss

Three officers responded to a 911 call about two men yelling outside a house. The first officer on scene released his police dog on a subject who eventually lay prone; the bite lasted 43 seconds while a second officer arrived and stood watch, and a third arrived and stood behind the handler with a taser drawn. The district court denied all three officers qualified immunity. The Fifth Circuit reversed as to the two bystander officers and rendered judgment for them. The reason is not that they did the right thing. The reason is that a 43-second window is not, in the panel’s view, a window long enough for the law to have already told them what to do.

The scene

Officer Johnson, a canine handler, arrived at 7:21 p.m. with sidearm drawn and commanded compliance. Thomas was noncompliant and yelling: the record includes “kill me,” “all lives matter,” and remarks the panel described as suggesting a desire to be shot. Officer Bruss arrived at 7:23:26, about two minutes into the encounter. Thomas went prone at 7:24:40. Officer Schultz arrived at 7:25:30. Between 7:27:10 and 7:27:18 Johnson issued final warnings, ending with “Last warning or I’m gonna send the dog.” At 7:27:18 Johnson released the dog. The bite landed on Thomas’s right upper arm. From 7:27:30 to 7:28:02 Johnson handcuffed Thomas while the dog held on. The dog continued biting from 7:28:02 to 7:28:17, when Johnson pulled the animal’s hind legs to release. Total bite: 43 seconds.

During the bite Bruss inspected the perimeter for part of the time. He told Thomas: “Soon as he gets you handcuffed, he’ll get the dog off you.” Toward the end he told Johnson to “take him off the bite.” Schultz stood behind Johnson with taser drawn, silent, and did not intervene; he called EMS after the dog was removed.

The rule

Bystander liability, sometimes called failure to intervene, makes a non-acting officer responsible for another officer’s constitutional violation when he stood by and watched. The panel restated the Fifth Circuit standard: a bystander officer may be held liable when he “(1) knows that a fellow officer is violating an individual’s constitutional rights; (2) has a reasonable opportunity to prevent the harm; and (3) chooses not to act.”

Qualified immunity guards that right the same way it guards every other. The panel set out the standard using the strongest formulation available: “pre-existing law must dictate, that is, truly compel (not just suggest or allow or raise a question about), the conclusion for every like-situated, reasonable government agent that what the defendant is doing violates federal law in the circumstances.” That word truly compel is the whole opinion in miniature. The panel is not looking for cases that suggest a duty to intervene. It is looking for cases that compel one.

What the court held

For the underlying force claim against Johnson the panel “assumed without deciding” that there might have been a constitutional violation and passed straight to clearly-established. Then came the durational holding, verbatim: “Because of the total duration of the dog bite was 43 seconds — a relatively short period of time for a bystander officer mentally to process the situation and then formulate a reaction — we cannot say that the law clearly required Bruss and Schultz to intervene sooner.”

The panel then added a paragraph that reads as an alleviative-action defense in miniature: “That is particularly the case with Bruss, who inspected the parameter during part of the 43 seconds and took alleviative action by telling Johnson to remove the dog bite toward the end of the 43-second bite.” Two escape hatches for one bystander in one sentence: a concurrent duty (perimeter security) and a mitigating instruction (tell the handler to stop).

The most useful part of the opinion is the list of cases the panel refused to accept as clearly-established authority. Any brief that leans on one of these for a bystander count, in this circuit, now has to answer the specific reason the panel gave. Carroll v. Ellington, 800 F.3d 154, involved four officers beating a man on the ground and tasering him roughly thirty-five times; the panel wrote it “does not control the bystander liability of two passive witnesses.” Trammell offered nothing on the point because the failure-to-intervene issue was waived. Deville v. Marcantel, 567 F.3d 156, is a direct-force / active-resistance case, “out-of-scope” for bystander liability. Hamilton v. Kindred, 845 F.3d 659, on a bystander watching a highly invasive and prolonged body-cavity search, was treated as a timing-and-opportunity precedent with “little bearing on a rapid canine restraint at night with late-arriving officers.” Joseph v. Bartlett, 981 F.3d 319, itself granted qualified immunity to the bystanders in a melee; the panel called it “remote.” Hale v. Townley, 45 F.3d 914, went the plaintiff’s way but on facts of actively encouraging a beating; the officers on scene here “never affirmatively acquiesced” in the conduct, and Hale is distinguished on that point. Cooper, 844 F.3d, on a canine handler releasing a dog for up to two minutes on an unarmed and compliant suspect, denied qualified immunity to the handler but “did not discuss bystander liability whatsoever.” And Sligh v. City of Conroe, 87 F.4th 290, granted qualified immunity to the bystander in a canine-bite case because the plaintiff there had also failed to identify clearly-established law. Sligh is now cited as a bystander analog, but as one that runs against the plaintiff.

What survived

Hamilton v. Kindred survived, in a narrow way. The panel did not overrule it; it distinguished it. Hamilton addressed a prolonged and invasive body-cavity search, not a rapid canine restraint. The distinguishing language leaves Hamilton alive for a bystander fact pattern with a slower tempo, more time to react, and no concurrent duty pulling the bystander’s attention elsewhere. That is a real opening. It is also a narrow one.

The panel’s framework for how bystander liability shades into complicity survived too: “(i) Knowledge, (ii) timing, and (iii) overt acquiescence may shape the scope of agency in principal-bystander relationships.” That formulation is the doctrinal handle for a future plaintiff whose bystander defendant did affirmatively encourage or coordinate rather than passively watch. It is a hard road but a paved one.

Why it matters

Bystander liability is analyzed under Graham reasonableness, the same rubric that governs direct force. But the right at stake is different, and the case law for the clearly-established prong has to match. Rogers v. Espinoza, an unpublished opinion decided a few weeks earlier, made the same point in one sentence. Thomas makes it in the same direction and puts three new lines of pressure behind it: a durational safety valve, an alleviative-action defense, and a rejected-precedent list.

The durational safety valve is the newest thing. Forty-three seconds, in this opinion, is characterized as a short period of time for a bystander to process and react. Any future bystander case with a materially shorter window now runs into that language before it reaches its own. A window materially longer than 43 seconds, a bystander count that turns on minutes rather than seconds, is where the language stops reaching.

The alleviative-action defense is the second thing. Bruss got out from under a bystander count because he was doing perimeter security part of the time and because he told Johnson to remove the dog. Neither would settle a direct-force claim. Both settled the bystander claim as to him. A plaintiff facing this defense should plead precisely what the officer was doing during the operative window and what he was not.

The rejected-precedent list is the third. Cooper, Deville, Joseph, Carroll, Hale, and Sligh either address direct force or grant qualified immunity to the bystander themselves. Anyone briefing a bystander count in this circuit now has to build a body of bystander-specific authority that the Thomas panel did not already reject. Hamilton v. Kindred, in the narrow zone the panel preserved for slower tempos, is where that body starts.

The opinion is published. It binds every future panel in the circuit and every district court in it. It landed in the same district it came out of. Read it that way, and brief the next one accordingly.

Thomas v. Bruss, No. 25-20590 (5th Cir. Sept. 2, 2026) (per curiam, published; King, Smith, Ramirez, JJ.) (reversing denial of qualified immunity and rendering judgment for the two bystander officers on failure-to-intervene, treating the 43-second total duration of a canine bite as too short for the law to have clearly required intervention). Bystander standard restated from Joseph v. Bartlett, 981 F.3d 319 (5th Cir. 2020). Clearly-established formulation quoted verbatim from the slip opinion. Analyzed here for the lawyering, not the politics. This is general information about a decided case, not legal advice.