A man was found dead with a gunshot wound Tuesday afternoon in the River North neighborhood.

Aaron Thompson, 28, from Perrysburg, Ohio, was discovered in a vehicle with a gunshot wound to the head at 12:17 p.m. in the 700 block of North Dearborn, according to Chicago Police and the Cook County Medical Examiner’s Office. He was found with a gun in his hand.

Thompson was pronounced dead at the scene by Chicago Fire Department personnel, police said.

His death was ruled a suicide following an autopsy Wednesday, the medical examiner’s office said.

Area Central detectives were conducting a death investigation.