On a mild Monday afternoon, with joggers on the sidewalk and students biking along the Charles River, a man walked down the middle of one of Cambridge’s busiest roads and started shooting at cars with a semi-automatic rifle. It was about 1:20 p.m. The stretch of Memorial Drive near the River Street Bridge turned into a scene that one witness compared to the video game Grand Theft Auto.
By the time it was over, two drivers were in critical condition with life-threatening injuries, at least a dozen vehicles had bullet holes in them, and the alleged gunman was shot, on the ground, and in custody. A Massachusetts State Police trooper and an armed civilian, a former Marine, had run toward the shooter and fired back. The suspect, 46-year-old Tyler Brown of Boston, is facing multiple charges including two counts of armed assault with intent to murder.
This is everything we know about what happened, who was involved, and the questions people are now asking about how Tyler Brown was on the street at all.
How the Shooting Unfolded on Memorial Drive
According to Middlesex County District Attorney Marian Ryan, Cambridge police first received a 911 call at about 1:06 p.m. The alert came from Boston police, who reported that an individual believed to be in Cambridge was acting erratically and possibly armed with a rifle. An officer safety bulletin with Brown’s photo had actually gone out earlier that morning, after his parole officer raised concerns.
By the time troopers and Cambridge officers got to Memorial Drive, Brown was already on foot in the middle of the road. Cars were stopped in traffic. He was walking between them, firing in what officials described as an “erratic fashion” at various vehicles. Witnesses reported seeing him in a dark hoodie and beanie, raising a long gun and pulling the trigger at random.
DA Ryan said between 50 and 60 rounds were fired during the entire incident. A gas station worker near the scene told reporters, “A guy holding a rifle, a semi-automatic rifle… I ran. He just started shooting out of nowhere, and he shot a lot.”
Two men sitting in separate cars were struck by gunfire. Both suffered life-threatening injuries. Investigators say there is no connection between Brown and either of the victims. They were simply on Memorial Drive at the wrong time.
The Trooper and the Marine Who Ran Toward the Gunfire
A Massachusetts State Police trooper arriving in his cruiser was immediately met with gunfire. A bullet struck his cruiser as he pulled up. Instead of pulling back, the trooper got out and moved toward Brown. At the same time, an armed civilian who happened to be in the area did the same thing. That civilian has been described as a former Marine with a license to carry a firearm.
Both the trooper and the Marine fired their weapons at Brown. He was struck multiple times in his extremities and went down. He was treated on scene and transported to a Boston hospital, where he was placed in the intensive care unit.
While all of this was happening, people were running. Drivers abandoned their cars in the middle of the road. Some were later found hiding under vehicles. One witness estimated that “easily 100” people fled the area as traffic snarled and drivers made frantic U-turns trying to escape the gunfire.
Rachel Saveriano was driving back to her office on Memorial Drive when it started. “I could see the shooter coming towards me in the middle of the road,” she told reporters. She froze. The Marine came to her car door, pulled it open, made a barricade with his body, and told her to run. She did, screaming to others to run as well. “I can’t say how much of a hero he is,” Saveriano said. “From the bottom of my heart, I feel like he saved lives here tonight.”
A USPS Truck Was Nearly Hit, Too
It wasn’t just personal vehicles that took fire. A U.S. Postal Service truck was also struck. A bullet went through the front windshield and hit just inches from the driver’s headrest. A coworker of the postal worker said the driver had been stopped at a red light when a round flew past her. She was not injured, but inches is inches. That is a detail that sticks with you.
DA Ryan made a point at the press conference of noting that Brown’s rifle had the capacity to strike people on the other side of the Charles River. This was not a handgun in a parking lot. This was a semi-automatic rifle being fired in the open on one of the most populated corridors in the Boston metro area, in the middle of a Monday afternoon.
Who Is Tyler Brown
Tyler Brown is 46 years old and from Boston. According to court records obtained by local reporters, his criminal record stretches back nearly two decades and includes prior firearm and drug convictions. He also has a prior conviction for stabbing and witness intimidation.
But the part of his record getting the most attention right now is what happened in May 2020. Brown fired 13 rounds from a .40 caliber Glock at two Boston Police officers responding to a “man with a gun” call in the South End, near Massachusetts Avenue and Chester Park. The two officers returned a combined five rounds. Nobody was hit. Brown was already on probation for the stabbing case at the time.
At his 2021 sentencing, prosecutors with the Suffolk County DA’s office recommended 10 to 12 years in state prison plus five years of probation. Suffolk Superior Court Judge Janet Sanders instead gave Brown five to six years, plus three years of probation and a mental health evaluation. Because that sentence ran concurrently with his probation violation, Brown was released after just a few years.
At the time, the DA’s office publicly called the lighter sentence “disappointing” and an insult to the officers who were nearly killed.
The Warning Signs on the Morning of the Shooting
Brown was on parole and was supposed to meet with his parole officer on Monday. According to investigators, the parole officer had reported earlier that day that Brown made a suicidal statement. A safety bulletin with Brown’s photo was circulated that morning, and his phone was pinging in Cambridge.
Around 12:30 p.m., Boston Police officers went to Brown’s Dorchester address to conduct a well-being check. He was not home. Roughly an hour later, he was on Memorial Drive with a rifle.
The timeline is tight. From the moment Boston police flag