RICHLAND, MI -- Michigan State Police are investigating after a Richland man reported he was randomly assaulted at his home this week.

Troopers were called to Borgess Medical Center Monday afternoon on the report of a man who had been injured in an assault in his backyard, according to Lt. Dale Hinz with the Michigan State Police. The victim, Raymond Holewa, was pushed into a bird feeder, then pushed into a fence and punched in the face, Hinz said.

The suspect was described as a 6-foot tall man wearing a dark winter hat and a camouflage mask. Holewa suffered minor injuries in the attack and was treated and released from the hospital, police say.

Holewa and his wife Richland Village Clerk Wanda Holewa have been vocal in their criticism of the Richland Police Department. Earlier this year, Wanda Holewa filed a written complaint against Police Chief Jeff Mattioli and his department, alleging harassment and intimidation.

An internal investigation found "no intentional harassment nor intimidation had occurred," according to an October resolution passed by the village council in support of the police department.

The village sent a copy of Holewa's complaint to the Michigan State Police, who found there were "strained relationships" between the police department and the village clerk over internal issues but found no reason to conduct a criminal investigation.

Hinz said Raymond Holewa requested that Michigan State Police investigate the assault.

At this point, investigators are unsure of the motive of the attack, but they haven't ruled out the possibility that Holewa was targeted for his criticism of the police department and the village council, Hinz said.

Police ask anyone with information on the attack to contact Michigan State Police Paw Paw Post at 269-657-5551.