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Lambert v. City of Onalaska — Fifth Circuit affirmed qualified immunity, finding officer had probable cause for school drop-off traffic stop and arrest

Unreported / Non-Citable

Case
Lambert v. City of Onalaska, Texas; Tammie Heeth, Officer
Court
United States Court of Appeals for the Fifth Circuit
Judge
Jones (Ronald Reagan, 1985); Clement (George W. Bush, 2001)
Date Decided
July 13, 2026
Docket No.
25-40508
Topics
Qualified immunity, Traffic stops, Retaliatory arrest, First Amendment, Fourth Amendment
Source
Read the full opinion

Background

Officer Tammie Heeth, a school resource officer at Onalaska Elementary School in Texas, directed traffic during morning drop-off. Parents arriving on time used Gantry Street to access the back entrance; after the 7:45 a.m. tardy bell, parents were redirected to Old Trinity Road and the front entrance. Amberley Lambert, a parent, frequently ignored this procedure and arrived late. After Lambert complained to the assistant principal that Officer Heeth treated her arbitrarily, Officer Heeth observed Lambert driving down South Farm to Market Road 356—a route parents were never supposed to take for pedestrian safety reasons.

Officer Heeth signaled Lambert to stop and turn around using a hand motion. Lambert stopped briefly, but as Officer Heeth approached, Lambert resumed driving past the officer at a slow pace. The parties dispute what happened next: Lambert claimed she misunderstood the signal and was driving at a “creeping” speed; Officer Heeth claimed Lambert hit her with the vehicle. Officer Heeth struck Lambert’s vehicle with her hand, announced Lambert’s arrest, and when Lambert refused to exit, climbed onto the running board and attempted to pull her from the window. Lambert was arrested and charged with aggravated assault of a public servant and resisting arrest. Over two years later, the State dismissed the assault charge for insufficient evidence, and a jury acquitted Lambert of resisting arrest.

Lambert sued Officer Heeth and the City under 42 U.S.C. § 1983, alleging Fourth Amendment violations (unlawful stop and arrest) and First Amendment retaliation (arrested because she complained about Officer Heeth). The district court granted summary judgment for the defendants, finding probable cause for the arrest and denying Lambert’s exception to the qualified immunity doctrine. Lambert appealed.

The Court’s Holding

The Fifth Circuit affirmed, holding that Officer Heeth had probable cause to both stop and arrest Lambert, defeating both constitutional claims. Under Texas Transportation Code § 542.501, it is a misdemeanor to willfully fail to comply with a lawful order of a police officer. When Officer Heeth signaled Lambert to stop and turn around, this constituted a lawful order. Lambert’s continued driving despite the signal—which Lambert may have subjectively misunderstood but was objectively a refusal to comply—provided probable cause for the stop and initial arrest. The court rejected Lambert’s argument that her subjective understanding was relevant, holding that what matters is whether a reasonable officer observing her conduct would conclude she was violating § 542.501. Additionally, Lambert’s resistance to Officer Heeth’s removal from the vehicle—testified to as “tense[ing her] body up” to prevent being pulled out—supplied independent probable cause for an arrest for resisting arrest under Texas Penal Code § 38.03.

On the First Amendment retaliation claim, the court applied the Nieves v. Bartlett standard, which generally permits probable cause to defeat retaliatory arrest claims. However, the Supreme Court recognized a narrow exception when officers have probable cause but typically exercise discretion not to arrest—such as jaywalking at intersections where it is endemic. Under this exception, a plaintiff may proceed if she produces objective evidence that similarly situated individuals not engaged in protected speech were not arrested. Lambert could not satisfy this exception. The court distinguished her conduct—driving at a police officer after receiving a lawful order to stop—from benign, endemic conduct like jaywalking. Because Lambert’s conduct was novel and serious, the absence of similar arrests warranted little weight. The court also rejected Lambert’s timing argument (arrest two days after complaint) as relevant only to the Mt. Healthy framework, which applies only after satisfying the Nieves exception—an approach necessary to avoid rendering Mt. Healthy redundant.

Key Takeaways

  • School resource officers may lawfully direct traffic and issue orders to parents at drop-off, and disobedience constitutes probable cause for arrest under state traffic laws.
  • The Nieves exception to qualified immunity in retaliatory arrest cases requires proof of similarly situated comparators engaged in endemic or benign conduct—not serious or novel violations.
  • An arrestee’s subjective misunderstanding of a lawful police order is irrelevant to the probable cause analysis; only the officer’s reasonable interpretation of the arrestee’s conduct matters.
  • Timing of an arrest relative to protected speech does not satisfy the Nieves exception and cannot be considered until the Mt. Healthy framework is reached.

Why It Matters

This decision reinforces the breadth of qualified immunity protection for police officers who possess probable cause for arrest, even in cases where retaliation is suspected. For parents and school communities, it clarifies that traffic control orders at school drop-off are enforceable, and disobedience can result in arrest. The decision also significantly narrows the Nieves exception by holding that the comparison class must involve truly endemic and benign violations, not serious criminal conduct. For retaliation claims generally, the court’s holding that timing evidence alone cannot substitute for comparative evidence of similarly situated non-complainers creates a high bar for plaintiffs to overcome probable cause.

The decision is notable for its treatment of the factual dispute regarding whether Lambert hit Officer Heeth. The court acknowledged that Lambert’s testimony created a genuine issue of material fact on this point and drew the inference in Lambert’s favor. Even accepting Lambert’s version of events, the court found probable cause existed based on her failure to comply with a lawful order—demonstrating that probable cause can rest on multiple independent grounds and that even favorable factual findings may not overcome it.

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