Authorities said the confrontation began after a 911 call for help from the man’s family on Mason Street.
LEXINGTON, Mass. — A 26-year-old man was fatally shot by police Saturday afternoon outside his home in Lexington after officers responded to a family’s 911 call reporting that he had injured himself with a knife, authorities said.
The shooting quickly became the focus of a state and local investigation because it involved an officer using deadly force during what began as a medical emergency. Middlesex District Attorney Marian Ryan said officers first moved other residents to safety, then tried less-lethal measures before the man was shot. The case now turns on what investigators, witness accounts and official records show about the seconds before the gunfire and whether any criminal conduct occurred.
According to Ryan, the chain of events started shortly after 1:30 p.m. when Lexington police received a 911 call from a resident of a Mason Street home asking for help because his son had hurt himself with a knife. Lexington officers arrived first, followed by members of the Northeastern Massachusetts Law Enforcement Council, or NEMLEC, who were already in town for Patriots’ Day events and heard the call over the radio. Officers escorted two residents from the house and left the 26-year-old man inside by himself, Ryan said. As officers set up outside, the man came out of the house carrying a large kitchen knife and moved toward them. “Two attempts were made to use less lethal force,” Ryan said at a Saturday night briefing. “They were not effective.” She said the man continued advancing before a Wilmington police officer assigned to NEMLEC fired the fatal shot.
Authorities have not publicly identified the man, saying his family had not yet been fully notified and had asked for privacy. Ryan said the man died at the scene. The Wilmington officer who fired was taken to a hospital as a precaution, but no serious injury to the officer was announced. Investigators have also not released how many shots were fired, what kind of less-lethal tools were used, or how much distance separated the man and officers when the confrontation ended. Ryan described the investigation as being in its early stages and said the home was known to police, though she did not explain what earlier contact officers may have had at the address. Those unanswered details are likely to become central as detectives review physical evidence, police radio traffic and witness interviews.
The shooting unfolded in a town already crowded for one of its busiest weekends of the year. Lexington was hosting Patriots’ Day activities, including the annual parade and events tied to the Battle of Lexington reenactment, bringing visitors and extra police presence into the area. Ryan said that extra presence shaped the response because NEMLEC officers were already nearby when the call came in. The killing also added to a recent string of fatal police shootings in Massachusetts and the Boston area. In several of those earlier cases, authorities said the person killed was armed with a knife or another edged weapon. That broader backdrop does not determine what happened on Mason Street, but it does add to the public attention on how police handle mental health crises, family emergency calls and fast-moving encounters that shift from aid calls to use-of-force cases in seconds.
The legal review now follows a familiar Massachusetts path for officer-involved deaths. Ryan said her office and the Massachusetts State Police detective unit assigned to the district attorney are conducting the investigation. She also said her office would seek a formal inquest, which is a court proceeding used to determine the facts and circumstances of a death and whether a crime occurred. That step does not itself mean charges are expected, but it places the shooting into a formal review process. Investigators are expected to examine officer statements, scene evidence, the knife, less-lethal devices, medical findings and any video from nearby homes, police equipment or public cameras. Officials had not announced a date for an inquest or any court filing by Sunday, and no criminal charges had been reported against any officer. The officer’s name also had not been released.
On Mason Street, the police response left a quiet neighborhood sealed off behind tape and cruisers as investigators worked into the evening. David Holzman, a resident who said he has lived in the area for about 35 years, described the sudden surge of police activity as jarring. “I’ve never seen anything like this in this neighborhood,” Holzman said. The sense of shock was sharpened by the contrast between a residential street and the large holiday crowds elsewhere in town. Ryan, speaking carefully and briefly, also signaled the emotional weight of the case. She said the family wanted room to grieve in private in the days ahead. That request, paired with the absence of the man’s name, left the public with only fragments of who he was beyond his age and the fact that the emergency began inside his family home.
As of Monday, the man’s identity had not been released, the officer had not been named, and investigators had said only that the case remained active. The next public milestone is expected to be additional findings from the district attorney’s office and, later, a formal inquest request in court.
Author note: Last updated April 20, 2026.