BOSTON — When convicted cop-shooter Tyler Brown went before the Massachusetts Parole Board in May of 2025, the case for letting him out of MCI-Shirley a year early — over the screams of the Suffolk County District Attorney's Office, over the warnings of the Boston Police officers he had tried to murder, and over his own documented mental-health diagnoses — came down to a few short sentences.
"Subject has completed Violence Reduction, Criminal Thinking and in Bachelors Program at Tufts University," the Parole Board wrote in its decision, obtained by the Boston Herald's Rick Sobey.
"Subject was smoking THC while in community as a tool to increase his appetite."
"Subject is remorseful about the part he played in the offense and realizes that this offense could have worked out."
That was the pitch. Massachusetts bought it. Brown walked out of state prison on May 21, 2025.
Three hundred and fifty-five days later, the same man sprayed roughly 60 rifle rounds across afternoon traffic on Memorial Drive in Cambridge, striking two motorists who remain hospitalized with life-threatening injuries — after his Massachusetts parole officer had spent the morning of the ambush warning Boston police on a 911 call that Brown had relapsed on crack, was waving a rifle on FaceTime, and had told the officer, "I'm not going back to prison."
The pitch: a Tufts syllabus and a medical-grade munchies habit
Brown's prior was not subtle. In May 2020, he opened fire on Boston Police officers responding to a call about a man with a gun on Northampton Street. Prosecutors said he ripped off 13 rounds at the officers — nearly three times as many as the two BPD officers fired back. He pleaded guilty in 2021 to eight charges including armed assault with intent to murder a police officer.
Then-Suffolk DA Rachael Rollins wanted 10 to 12 years in state prison plus five years of probation. Suffolk Superior Court Judge Janet Sanders gave him 5 to 6. Rollins called the sentence "disappointing." One of the officers Brown had tried to kill submitted a victim impact statement that read, in part: "I am a firm believer that when Mr. Tyler Brown gets out, he will hurt, or worse, kill someone."
Brown served about three and a half years.
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The Parole Board's 2025 decision did acknowledge his diagnoses. "Subject suffers from MH disorder w/ PTSD, Depression and Anxiety and taking medications on a daily basis," the board wrote. It also credited his enrollment in a Tufts University bachelor's program and his completion of internal "Violence Reduction" and "Criminal Thinking" classes.
What the board apparently weighed against all of that: Brown's own statement that he was sorry, and the disclosure that he was using THC, in his telling, as an appetite booster.
The board granted release.
The conditions: 90 days of ankle monitor, then trust
Brown's parole certificate, as detailed in the Herald, came with a stack of special conditions. He had to:
- Waive work for school
- Wear an electronic monitoring ankle bracelet for the first 90 days after release
- Take prescribed medication
- Submit to drug supervision
- Submit to liquor-abstinence supervision
- Report to the parole office on the day of release
- Report to the probation office in Suffolk Superior Court
- Have no contact with any of his 2020 victims or their families
- Undergo mental health counseling for PTSD, anxiety, and depression
- Continue in the Tufts University Program
The monitoring bracelet came off after 90 days. By the morning of Monday, May 11, 2026 — Day 355 of his supervised release — the rest of the conditions appear to have collapsed.
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Brown had been discharged from McLean Hospital three days earlier, according to the criminal complaint obtained by NBC10 Boston. State Police Trooper Christopher Hardy wrote that Brown's parole officer told 911 dispatchers Brown had told the officer on a FaceTime call that he had relapsed on crack and was suicidal, and that he had displayed a semi-automatic rifle on the same call and threatened to use it. The Boston Regional Intelligence Center pushed out an officer-safety bulletin with Brown's photograph that morning. BPD attempted a wellbeing check at his Dorchester home around 12:30 p.m.
Brown's phone, the bulletin noted, was pinging in Cambridge.
Shortly after, he was walking down the middle of Memorial Drive in broad daylight, firing into traffic, until a Massachusetts State Police trooper and a civilian — a former U.S. Marine — shot him down.
What the Parole Board won't say
The Massachusetts Parole Board declined to elaborate.
A board spokesperson told the Herald that any further information about Brown's time in the custody of the Department of Correction or on parole supervision is "exempt from disclosure" because of the state's Criminal Offender Record Information (CORI) confidentiality law and several state regulations.
In other words: the only window the public will get into how a man who tried to kill Boston police was released a year early — and how the supervision regime that followed unraveled in less than 12 months — is the decision memo the Herald managed to obtain, and the four sentences the board chose to put on paper.
The ones about Tufts. The ones about THC and appetite. And the one in which Tyler Brown reflected that his prior offense "could have worked out."
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