Overview
- The Middlesex County District Attorney’s Office confirmed a deadly shooting involving a police officer in Lexington and opened an investigation.
- Police blocked Mason Street with cruisers and tape and sealed two areas for investigators after the shooting.
- A white tent stood along the roadside as officers worked at the secured scene.
- District Attorney Marian Ryan was present at the site but had not provided a briefing, and officials released no names.
- Neighbors described the block as a quiet residential area located less than a mile from the Patriots Day parade route.