Background
At 3:30 a.m. on March 11, 2019, Officer Zachary Ware initiated a traffic stop of Christopher Lockhart, a 61-year-old licensed bail bondsman and private investigator, after observing his tires touch the centerline while rounding a curve. During the roadside interaction, Officer Ware observed multiple signs of impairment: Lockhart’s speech was slow, raspy, slurred, and stuttering; his eyes were bloodshot and glassy with droopy eyelids; and he appeared close to falling asleep. Lockhart disclosed that he had taken Gabapentin, a prescription pain medication, more than twenty-four hours earlier and exhibited confusion when attempting to locate his license and registration.
Officer Ware administered field sobriety tests, during which Lockhart exhibited fourteen out of eighteen indicators of impairment. Lockhart disclosed that he had undergone hip replacement surgery resulting in different leg lengths and wore a heel lift. At the station, Lockhart’s blood alcohol concentration tested 0.00, though his urine toxicology showed nicotine and five other substances including Amitriptyline, Nortriptyline, Cyclobenzaprine, Doxepin, and Desloratadine. Detective Tiffany Adams conducted a Drug Recognition Expert evaluation and opined that Lockhart was not impaired but rather a “medical rule-out”—his symptoms resulted from medical conditions, not intoxication.
Despite Detective Adams’s opinion, Officer Ware arrested Lockhart for driving while intoxicated, careless driving, and driving left of center. The city subsequently dismissed the traffic charges. At trial on the DWI charge, Lockhart was acquitted after the prosecutor presented no evidence supporting the DWI allegation. Lockhart sued under 42 U.S.C. § 1983 for false arrest and brought additional state law claims.
The Court’s Holding
The Eighth Circuit reversed the district court’s denial of qualified immunity to Officer Ware, holding that the officer had probable cause to arrest Lockhart for DWI based on the totality of the circumstances. The court held that probable cause is a legal question, not a factual one, and must be assessed from the standpoint of an objectively reasonable police officer at the time of arrest. The observed impairment indicators—slurred speech, bloodshot eyes, poor field sobriety test performance (14 of 18 indicators), and Lockhart’s admission of recent medication use—constituted “a probability or substantial chance” that Lockhart was driving while intoxicated.
The court rejected Lockhart’s argument that his 0.00 blood alcohol concentration negated probable cause, noting that Officer Ware suspected drug impairment, not necessarily alcohol impairment. Similarly, the court held that Detective Adams’s opinion that Lockhart’s symptoms resulted from medical conditions rather than impairment did not eliminate probable cause when assessed under the totality-of-circumstances standard. The presence of conflicting evidence or possible alternative explanations does not vitiate a finding of probable cause so long as it is reasonable to conclude from the evidence as a whole that a crime was committed.
Because the court found no violation of a constitutional right, Officer Ware was entitled to qualified immunity without addressing whether the right was clearly established. The court also declined to revisit its prior decision upholding the denial of summary judgment on Lockhart’s malicious prosecution claim against Siloam Springs under the law-of-the-case doctrine.
Key Takeaways
- Probable cause for arrest exists when the totality of circumstances supports a reasonable suspicion of criminal activity, even if subsequent testing (such as 0.00 BAC) suggests no alcohol impairment.
- Expert opinions identifying medical causes for impairment-like symptoms do not automatically negate probable cause when assessed against all observed facts and circumstances.
- Qualified immunity protects officers who make reasonable judgments based on objective facts observed at the time, not whether alternative or more reasonable interpretations can be constructed after the fact.
- Drug impairment arrests do not require alcohol detection; officers may make probable cause determinations based on observed behavioral and physical indicators consistent with intoxication generally.
Why It Matters
This decision reinforces broad protection for law enforcement officers conducting impairment-based arrests under the qualified immunity doctrine. By holding that the totality of circumstances standard overrides alternative explanations—including expert medical opinions—the court gave officers substantial latitude to make DWI arrests based on observed impairment indicators, even when objective testing contradicts the officer’s suspicion. This is particularly significant for drug-impairment arrests, where alternative medical explanations for symptoms are common.
The ruling has implications for citizens with legitimate medical conditions that produce impairment-like symptoms. The court’s framework allows arrests to proceed to prosecution and trial even when a Drug Recognition Expert concludes the defendant is not impaired, placing the burden on the defendant to be acquitted at trial rather than preventing arrest based on exculpatory evidence available to police at the roadside.