Saturday marks five years since a Massachusetts police officer was fatally shot in the line of duty. Auburn Patrolman Ronald Tarentino Jr. was just 42 years old when he was shot in the back during a traffic stop by a man he pulled over on May 22, 2016. Tarentino was later pronounced dead at UMass Memorial Medical Center. Sign up for our Newsletters Tarentino, a Leicester resident and son of a longtime Medford police officer, had served on the.