Suspect Arrested in Hit-and-Run Crash that Killed Waltham Police Officer and Utility Worker

A Waltham police officer and a National Grid worker were killed in a hit-and-run crash during a roadside detail in Waltham, Massachusetts. The driver fled the scene and later stole a police cruiser at knifepoint before being arrested. The suspect, Peter Simon, has been charged with two counts of manslaughter and armed robbery. The officer, Paul Tracey, was a 28-year veteran of the Waltham Police Department.