Overview
- Tyler E. Brown, 46, entered not guilty pleas by video on Thursday and will remain in custody pending a May 21 hearing, according to Cambridge District Court.
- Brown is accused of stepping into traffic on Memorial Drive and firing an assault-style rifle at cars Monday, in what prosecutors described as a random attack that sent drivers diving for cover.
- Investigators recovered more than 70 shell casings, and prosecutors said two motorists were wounded, with one man released after a head wound and another still hospitalized after being shot in the leg.
- About an hour before the gunfire, Brown told his parole officer on a video call that he had relapsed and was suicidal, police pinged his phone to track him to Cambridge, and a state trooper and an armed civilian then shot and wounded him during the confrontation.
- Court records and prosecutors outlined a long criminal history, including prior assault and gun convictions and supervision in multiple states, as officials review how recent psychiatric discharge and parole supervision intersected with public safety.