SHAWNEE COUNTY — Law enforcement authorities are investigating a robbery and asking the public for help to identify a suspect.

Just after 4p.m. Monday, police responded to a theft and aggravated battery call at Murphy’s Express, 1531 SW Wanamaker in Topeka, according to Lt. Aaron Jones.

Officers learned during a suspected theft a 58 year-old man  attempted to intervene in the theft.

He was knocked to the ground by the suspect’s dark blue, late 90s Chey Cavalier in the parking lot. The victim suffered minor injuries.

Detectives are looking for the suspect and police released a security camera image. Anyone with information is asked to call Topeka Police.