A knife-wielding man was fatally shot by police Monday evening at a Piscataway house, and three dead bodies were then discovered inside the home, investigators said.

Uxbridge police officer Stephen LaPorta was helping a motorist when he was hit and killed by a tractor-trailer.

A Washington, D.C. Metropolitan Police Officer struck by a car last month while helping a stranded motorist has died from his injuries, the department announced Thursday.

“This heartbreaking incident reminds us of the risk that law enforcement officers take every day,” Chief Montminy said. “Officer LaPorta gave his life in service to this community — a sacrifice that w...