Trending Now - Gunman Opens Fire on Traffic in Cambridge, Two Injured

WHO:

Boston.com News - Tyler Brown was on probation for firing several rounds at police officers in the South End in May 2020.

CBS News - Middlesex District Attorney Marian Ryan stated, "it was already an active shooter situation" when officers responded.

CBS News - Ryan mentioned that the trooper's cruiser was also struck by gunfire.

CBS News - The suspect is identified as 46-year-old Tyler Brown.

CBS News - Middlesex District Attorney Marian Ryan provided statements regarding the incident.

CBS News - A Massachusetts State Police trooper and a civilian, a former Marine, engaged the suspect.

WHAT:

CBS News - Witnesses reported that the gunman was seen on video waving and shooting a long gun while walking down the middle of the street.

CBS News - A woman in a small school van reported that she heard at least 15 or more shots during the incident.

CBS News - A witness described the gunman hitting the radiator of his car and the headlight of another vehicle during the shooting.

CBS News - At least 15 Massachusetts State Police cruisers and Cambridge police officers were on the scene following the incident.

CBS News - Witnesses reported that the gunman fired upwards of 60 bullets during the incident.

CBS News - A civilian, identified as a former Marine with a license to carry a firearm, engaged the suspect alongside a State Police trooper.

CBS News - "Both the trooper and the civilian fired their weapons, and that suspect was struck multiple times in the extremities," said Middlesex District Attorney Marian Ryan.

CBS News - "This incident lasted minutes because thanks to the actions of that trooper and that civilian," Ryan stated.

CBS News - "We know that that weapon had the capacity to have struck people on the other side of that river," Ryan added.

CBS News - Brown is facing several charges including two counts of armed assault with intent to murder; it is unclear when he will be arraigned.

CBS News - Witnesses reported that the gunman fired upwards of 60 bullets during the incident.

CBS News - The suspect fired upwards of 60 bullets during the incident.

CBS News - Two men in separate vehicles are currently being treated for life-threatening injuries at Boston hospitals.

CBS News - Witnesses reported hearing at least 30 shots fired during the incident.

CBS News - A photo of Tyler Brown was included in an officer safety bulletin that went out Monday morning.

CBS News - Shortly after 1 p.m., Cambridge Police received a 911 call from Boston Police about Brown, who was believed to be in the area and in possession of a rifle.

CBS News - Witnesses reported hearing at least 15 or more shots during the incident.

CBS News - Traffic in Cambridge is impacted as a large portion of Memorial Drive and the surrounding area is marked off with police tape and closed to traffic.

CBS News - Massachusetts Gov. Maura Healey stated, "There is no ongoing threat to the public."

CBS News - Brown is currently being treated for gunshot wounds in the intensive care unit.

CBS News - Investigators do not believe there is any link between Brown and any of the people who were in the cars that were struck.

CBS News - A gunman opened fire on cars on Memorial Drive, injuring two men who are in life-threatening condition.

CBS News - The suspect fired 50-60 rounds and struck at least a dozen vehicles.

CBS News - Brown is facing several charges, including two counts of armed assault with intent to murder.

ABC News - At least one person was reported wounded in the shooting incident.

WHERE:

CBS News - Memorial Drive is located along the Charles River in Cambridge, Massachusetts, minutes from Boston.

CBS News - The incident occurred on Memorial Drive in Cambridge, Massachusetts, near the intersection of River Street.

CBS News - The shooting occurred on Memorial Drive in Cambridge, Massachusetts.

CBS News - The incident took place near the intersection of Memorial Drive and River Street.

WHEN:

CBS News - The shooting occurred around 1:30 p.m.

CBS News - Police attempted a well-being check at Brown's home at about 12:30 p.m.

WHY:

CBS News - Brown's parole officer reported that he made a suicidal statement, prompting police to check on him.

HOW:

CBS News - Witnesses described the gunman shooting at random as cars drove by on Memorial Drive.

CBS News - Witnesses described the gunman as walking down the middle of Memorial Drive, firing the rifle in "an erratic fashion at various vehicles along the road."

CBS News - A civilian, identified as a former Marine with a license to carry a firearm, engaged the suspect alongside a State Police trooper.

CBS News - Witnesses described a Massachusetts State Police trooper arriving and engaging the gunman within seconds of the shooting starting.

CBS News - Witnesses reported that a Massachusetts State Police trooper arrived and engaged the gunman within seconds of the shooting starting.

CBS News - Witnesses reported that Brown was walking down the middle of the street firing a rifle in an erratic manner.

CBS News - A State Police trooper and a civilian responded to the situation and engaged the suspect, firing their weapons and striking him multiple times.

CBS News - Troopers provided first aid to both the victims and the suspect after the shooting.

(UPDATED May 12, 2026 21:22 UTC)

Witnesses reported a chaotic scene as a gunman was seen on video waving and shooting a long gun while walking down the middle of the street, with one woman in a small school van stating she heard at least 15 shots during the incident. Another witness described the gunman hitting the radiator of his car and the headlight of another vehicle as he shot at random while cars drove by on Memorial Drive. In response, at least 15 Massachusetts State Police cruisers and Cambridge police officers quickly arrived on the scene to manage the situation.

(UPDATED May 12, 2026 19:29 UTC)

A gunman opened fire on Memorial Drive in Cambridge, Massachusetts, discharging over 60 bullets in an erratic manner at vehicles along the road. A former Marine, who was licensed to carry a firearm, teamed up with a State Police trooper to engage the suspect, resulting in the gunman being struck multiple times in the extremities. Middlesex District Attorney Marian Ryan noted that the quick actions of the trooper and the civilian helped to contain the situation within minutes, preventing potential harm to others across the river.

(UPDATED May 12, 2026 17:38 UTC)

Tyler Brown, who was on probation for firing several rounds at police officers in the South End in May 2020, is now facing multiple charges, including two counts of armed assault with intent to murder, although it's unclear when he will be arraigned. Witnesses reported that during the incident on Memorial Drive in Cambridge, Massachusetts, Brown fired upwards of 60 bullets while walking down the middle of the road, targeting various vehicles in an erratic manner. The alarming scene unfolded near the intersection of River Street, leaving the community shaken.

(UPDATED May 12, 2026 15:51 UTC)

During a recent incident, a suspect fired upwards of 60 bullets, resulting in two men in separate vehicles being treated for life-threatening injuries at Boston hospitals. Witnesses reported hearing at least 30 shots during the chaos, while a civilian, identified as a former Marine with a license to carry a firearm, engaged the suspect alongside a State Police trooper. The situation highlights the rapid response of law enforcement and civilians in the face of danger.

(UPDATED May 12, 2026 13:31 UTC)

A photo of Tyler Brown was included in an officer safety bulletin that went out Monday morning, prompting a 911 call to Cambridge Police from Boston Police shortly after 1 p.m., as Brown was believed to be in the area with a rifle. Witnesses reported hearing at least 15 shots during the incident, and traffic in Cambridge is currently impacted with a large portion of Memorial Drive and the surrounding area closed off with police tape. Massachusetts Governor Maura Healey has reassured the public, stating, "There is no ongoing threat to the public," as a Massachusetts State Police trooper engaged the gunman within seconds of the shooting starting.

(UPDATED May 12, 2026 04:11 UTC)

Middlesex District Attorney Marian Ryan confirmed that it was already an active shooter situation when officers responded, and she noted that a trooper's cruiser was struck by gunfire during the incident. The individual known as Brown is currently receiving treatment for gunshot wounds in the intensive care unit, while investigators have determined there is no connection between Brown and the occupants of the cars that were hit. Witnesses reported that a Massachusetts State Police trooper arrived and engaged the gunman within seconds of the shooting starting.

(UPDATED May 12, 2026 01:29 UTC)

A gunman identified as 46-year-old Tyler Brown opened fire on cars on Memorial Drive in Cambridge, Massachusetts, injuring two men who are now in life-threatening condition. Witnesses reported that Brown was walking down the middle of the street firing a rifle in an erratic manner, prompting police to check on him after a suicidal statement was made by his parole officer. A Massachusetts State Police trooper and a civilian, a former Marine, engaged Brown, firing their weapons and striking him multiple times, while troopers provided first aid to both the victims and the suspect.