AKRON, Ohio -- A security guard who responded to an alarm at a car dealership was shot and killed, and police were searching for a suspect.

Buckeye Protective Service sent Michael Laughlin, 60, of East Rochester, to the dealership Friday night after broken glass and a door sensor set off the alarm, police said.

Laughlin contacted the service after he arrived and no one spoke with him again, Lt. Rick Edwards said.

Laughlin was shot at least once in the head, Edwards said.

SLIDESHOW: Dealership Shooting Scene

A witness told police she saw two men struggling at the dealership and heard the shots fired about 7:30 p.m. Friday. Police were searching for a man based on the woman's description.

There was no indication of a robbery at the car dealership, Edwards said. Police were trying to determine the motive.

A $7,500 reward is being offered. Anyone with information should call Akron police at (330) 375-2490.