FRIDAY, MAY 15, 2026
Dear Cambridge and Somerville Constituents —
On Monday afternoon, I got a text about an active shooter on Memorial Drive, and immediately the mind begins to race: who do I know in the area? Has anyone been shot? Is the threat ongoing?
Soon, we were getting more detailed reports of a horrific situation — an agitated man, waving an assault-style rifle, stalking up and down Memorial Drive, shooting indiscriminately at vehicles as hundreds of people ducked for cover or ran for their lives.
I want to commend the courage of the state trooper and the civilian Marine who ran toward the danger and ultimately disabled the shooter, Tyler Brown, by returning fire. Even after he was shot, Brown appeared to let off a few more rounds from his assault weapon before throwing it to the side and surrendering.
Afterward, I spoke with District Attorney Marian Ryan, and she told me when she arrived on scene, it looked like something out of a war zone. Had Mr. Brown been active for another few minutes, he might have fired another 100 rounds. That gun was so powerful, it could have struck people on the other side of the Charles River.
Victims, Trauma, and Community Response
On Wednesday evening, I was invited to speak at a vigil organized by Cambridge DSA at Cambridge City Hall. I felt it was important to be in community to acknowledge the severity of this event as we all do our best to support our neighbors.
At the vigil, I spoke about the two victims, still hospitalized and in critical condition. One of the victims is a 35-year-old man who lives in Cambridge and works as a delivery driver. He was simply on the way to the car wash when he suffered a life-threatening gunshot wound.
The other victim is an MBTA Ride driver who was on duty at the time — he was reportedly shot in the head and somehow managed to drive himself to the hospital. Both of the shooting victims and the shooter himself may have died if it weren't for first responders and fast medical attention at our world-class hospitals.
Of course — these are not the only victims of this horrible shooting. Hundreds of people were in the vicinity of 808-812 Memorial Drive when the gunfire erupted. The trauma these individuals are experiencing now is very real. Indeed, people across our community are shaken and traumatized by this incident.
As one person said at Wednesday's vigil, "this was a mass shooting." Miraculously, no lives were lost. But hundreds of people were sent running from up to 70 rounds of gunfire.
In the aftermath of this terror, I reached out to some constituents at 808-812 Memorial Drive to check in, and I heard a desire for an official response to help process and debrief this terrible incident. I have been in touch with the City Manager throughout the week regarding plans for a community meeting.
A Community Debrief meeting is now scheduled for Tuesday from 6 to 8 pm at the Cambridge Community Center, 5 Callender St. Myself and other elected officials, the Cambridge Police Department, Cambridge Public Health, and the Riverside Trauma Center will all be on hand to answer questions and address concerns. Refreshments will be provided.
Meanwhile, I've been in touch with the community engagement manager at the Rivermark Apartments on the need to support affected residents in the abutting buildings. I am told a series of meetings are being scheduled for next week, and I plan to be present there as well.
If you or people you know are experiencing grief or trauma, support is available via the Cambridge Community Response Network, the Center for Homicide Bereavement at CHA, and others. Please don't hesitate to reach out to me or my staff directly for assistance in connecting to resources.
Policy Concerns
Commentators immediately lambasted (now retired) Judge Janet Sanders, who in 2021, sentenced Mr. Brown to 5 to 6 years in state prison, followed by probation and conditions of treatment, after he was convicted of shooting at Boston police officers. He had a violent criminal history — along with a history of finding it difficult or impossible to access mental health care.
Conservatives and right-wingers are incredulous that the judge didn't follow the prosecutor's recommendation for a 10 to 12 year prison sentence. Even former DA Rachel Rollins is complaining about that sentencing decision, as is Governor Healey.
However, I agree with retired Superior Court Judge Jack Lu, the former chair of the Massachusetts Sentencing Commission, who argued criticism of the sentencing decision is misplaced. Mr. Brown had a documented mental health history, with reports of PTSD, so a sentence of 5 to 6 years, followed by significant mental health treatment, was "a fair decision, a just decision," according to Judge Lu.
The failure — a point echoed by attendees at Wednesday's vigil — was not necessarily in the duration of the prison sentence. Rather, the failure appears to be in the mental health response and the conditions leading up to Mr. Brown's reentry. After all, whether Brown was sentenced to 6 years or 10 years — he was a middle-aged man who was going to return to society — so how did the system support him and prepare him for that re-entry?
Reportedly, Mr. Brown was released from McLean Hospital just three days before the shooting. Over the weekend, he relapsed with drug use, and — facing a drug test that would have sent him back to prison on Monday afternoon, he was on a video call with his parole officer when he brandished the assault weapon and declared, "I am not going back to prison." The parole officer immediately called Boston police, setting off a frantic search to locate him.
For me, this raises questions about how the criminal legal and mental health systems deal with individuals struggling with substance use disorder, PTSD, and other issues.
More broadly, I remain proud of what we've accomplished with criminal justice reform in Massachusetts, as we've cut the prison population nearly in half over the past ten years. While a full investigation is pending, we should not use this one incident as a justification for going backward on criminal justice reform. Rather, we should address much harder questions around mental health treatment, state budgets, and re-entry supports for people who are incarcerated.
Finally, there's the question of how Mr. Brown got his hands on that terrifying rifle.
In Massachusetts, we have the nation's strongest gun control laws. In July 2024, we passed An Act Modernizing Firearm Laws, which strengthened the assault weapon ban, addressed the problem of "ghost guns," expanded mental health and risk protections, and strengthened sensitive-place restrictions, licensing, and training requirements.
While we can be proud our gun laws are strong, in many ways, our laws are only as good as the laws in other states, as states like New Hampshire have some of the least restrictive gun laws in the nation.
A final point I emphasized at Wednesday's vigil is how conservatives are now working to dramatically weaken our Massachusetts gun laws. The Massachusetts Firearm Regulations Referendum is now heading toward the November ballot. It will ask voters to repeal our 2024 gun law. For my part, I am a very strong supporter of our gun laws, and I would encourage everyone to vote Yes on that ballot question (to uphold our 2024 law).
Thank you, as always, for being an informed and engaged constituent. If you or anyone you know is in need of community resources right now, please don't hesitate to reply to this email or call me directly.
Yours in service,
Mike
