Detectives say, between January and May, the suspect has hit an office building at 111 Presidential Boulevard in Bala Cynwyd, 11 times.
He's gotten away with several items including flat screen TVs and petty cash. The suspect was caught on surveillance video.
Police will release that video later today.
Action News reporter Sarah Bloomquist will have more on this story tonight, starting at 5 p.m.
