An investigation is underway after authorities say a Winchester, MA, police officer fatally shot a knife-wielding man inside an apartment on Monday.
A security guard for the Parkview Apartments on Swanton Street called 911 just after 8 p.m. to report that a resident of the building, a 35-year-old man, had reported an issue within his unit, Middlesex District Attorney Marian Ryan and Winchester Police Chief Peter MacDonnell said in a joint press release.