Overview
- Authorities confirmed a deadly shooting involving a police officer in Lexington and opened an investigation.
- Police blocked sections of Mason Street with cruisers and tape, and a white tent went up as evidence work began.
- District Attorney Marian Ryan was on scene, her office issued a one-line confirmation, and she did not brief reporters.
- Officials have not shared who was involved or what led to the shooting as the inquiry continues.
- In Massachusetts, county prosecutors typically review police shootings, which explains the DA’s role, and neighbors said the heavy response was rare for the quiet area near the Patriots Day parade route.