Sergeant James Timothy Chapin, 51, was killed in the line of duty in Chattanooga, Tennessee, on Saturday, April 2, 2011, while responding to an armed robbery. A 27-year veteran of the Chattanooga Police Department who had also served with the U.S. Capitol Police Department, Chapin arrived at a pawn shop on Brainerd Road where an armed suspect was attempting a robbery.

Officers arrived about 10:25 a.m. The suspect opened fire from inside the store, then fled through a side door while continuing to shoot. Chapin was arriving in his patrol car when the suspect fired into the vehicle. After his patrol car struck the suspect, Chapin exited and began a foot pursuit; he was fatally shot in the head during that chase. Another officer was struck in his ballistic vest but not seriously injured.

The suspect was wounded and taken into custody at the scene. Does anyone have information about Chapin’s life or service, or recollections of the incident that could help build a fuller picture of what happened?