When a Police Chase Becomes a Seizure: Commonwealth v. Palmer

On August 10, 2026, the Supreme Judicial Court decided Commonwealth v. Palmer, SJC-13873 (Mass. Aug. 10, 2026), a case that turns on two questions that decide most street-stop suppression motions: at what moment the police seize a person who runs from them, and whether the police had reasonable suspicion at that moment. The Court held that the defendant was seized when several officers converged and gave chase, before he discarded drugs, but that the seizure was lawful because the police had reasonable suspicion to believe he had committed an earlier robbery. The conviction was affirmed. The reasoning is a useful guide to how these motions are won and lost.

Why the Moment of Seizure Matters

Whether the police stopped the defendant before or after he discarded the drugs was decisive. If the seizure occurred before he discarded the drugs, the drugs could be the fruit of that seizure and subject to suppression if the stop lacked reasonable suspicion. If the seizure occurred after he discarded the drugs, the drugs were abandoned property and could not be the fruit of the seizure, regardless of whether the later stop was constitutional. See Commonwealth v. Barros, 435 Mass. 171 (2001); Commonwealth v. Stoute, 422 Mass. 782 (1996). Fixing the precise moment of seizure is therefore critical to the outcome, and it is the first question in most Massachusetts drug cases that begin with a street encounter.

What Happened in the Parking Lot

A Boston police detective investigated a robbery and shooting at an apartment complex in the Jamaica Plain section of Boston. She reviewed surveillance footage from the day of the robbery and developed her own description of the suspect, including a distinctive two-toned jacket, reflective sneakers, a black and white checked hat with a large round logo and a metallic tag on the brim, a dark complexion, and a long dreadlock hairstyle. She then reviewed footage from the day after the robbery showing the same person, unmasked, in the same location. Twelve days later, a housing authority officer reported that the same individual was back at the complex. The detective went to the parking lot with other detectives wearing visible badges, and four uniformed officers responded in a wagon. When the detectives called for the defendant’s attention, he ran. Officers converged from more than one direction and chased him. As he ran, he discarded bags later identified as drugs, and he was detained a few seconds later.

When Pursuit Becomes a Seizure

A person is seized under art. 14 when, in the totality of the circumstances, an officer engages in a show of authority that a reasonable person would consider coercive, that is, conduct that objectively communicates that the officer would use police power to require the person to stay. See Commonwealth v. Matta, 483 Mass. 357 (2019). Not every encounter is a seizure, because officers are free to approach individuals and ask questions. Pursuit, however, is the functional equivalent of a seizure when the person pursued is plainly the object of an official assertion of authority that does not intend to be denied and that infringes considerably on freedom of movement. See Stoute, 422 Mass. at 789. The Court held that the defendant was seized when two groups of officers, detectives with visible badges and uniformed officers, converged from different directions and chased him after he fled. That was a show of authority a reasonable person would consider coercive.

The Court distinguished Commonwealth v. Franklin, 456 Mass. 818 (2010), where officers followed a defendant on foot after he began running from an unmarked car, and no seizure occurred until officers physically grabbed him. In Palmer, the defendant fled in response to what the officers did, and two groups of officers converged on him in a confined residential parking lot. Those facts made the pursuit a seizure before the drugs were discarded.

What Reasonable Suspicion Requires

Reasonable suspicion must rest on specific and articulable facts, and reasonable inferences from those facts, judged by the totality of the circumstances at the time of the stop. It requires more than a hunch and less than probable cause. See Commonwealth v. Robinson-Van Rader, 492 Mass. 1 (2023); Commonwealth v. Privette, 491 Mass. 501 (2023). A broad, general description does not by itself establish reasonable suspicion, particularly where the description could fit many people in the area. See Commonwealth v. Warren, 475 Mass. 530 (2016); Commonwealth v. Meneus, 476 Mass. 231 (2017). The Court has been especially cautious where a stop rests on general characteristics such as race, dark clothing, or a common hairstyle.

Palmer was not that case. The detective did not rely on a witness’s vague description. She reviewed the footage herself, developed a detailed description that included a distinctive hat, and recognized the same individual in the same location on more than one occasion. The Court held that the combination of physical characteristics, the distinctive hat, and the location of the robbery established reasonable suspicion. Flight and the character of the area were given only minimal weight, as the law requires, but they were properly part of the totality.

The Bottom Line for a Pending Case

The Court confirmed that a foot pursuit can be a seizure and that the drugs a person drops while being chased are not automatically abandoned. The defense should identify the exact instant the police made a coercive show of authority, then test whether the specific and articulable facts known at that instant supported the stop. Where the police act on a general description that could fit many people, the stop is vulnerable, and the evidence that followed may be suppressed as the fruit of an unlawful seizure. These questions arise constantly in drug possession and distribution cases and are litigated through the motion to suppress under Article 14. The firm’s discussion of how Massachusetts drug cases are won addresses the suppression strategy in more detail, and the drug crimes FAQs answer the questions that come up first. Attorney Serpa examines the timing of the stop and the facts known to the officer in every case that begins with a street encounter.