Off-Duty Officer Saves Victim in Knife-Wielding 'Road Rage' Attack

A Medford man faces charges after allegedly threatening another driver with a knife during a Malden road rage incident in broad daylight Monday. 

Derek Michael Mozuch, 24, was arrested for alleged reckless operation of a motor vehicle, assault with a dangerous weapon, speeding, a marked lanes violation and threatening to commit a crime.

Lt. Det. Marc Gatcomb said off-duty Officer Rob Selfridge saw Mozuch chasing another motorist with a knife around 12:45 p.m. Monday, near the intersection of Highland Avenue and Charles Street.

After Selfridge identified himself as a police officer, Gatcomb said the suspect got into his vehicle and fled the scene. He was later arrested in Woburn Monday. 

"By quickly intervening and activating himself, Officer Selfridge most likely prevented  injury to the victim, and assisted with compiling and disseminating a quick and accurate description to help locate the suspect," Gatcomb wrote.