The Disappearance of Mel Wiley

In 1985, Mel Wiley, the police chief in Medina County, Ohio, tells his girlfriend he's meeting an old friend for a swim in Lake Erie. Three days later, park rangers find his abandoned car with his clothes, money and police ID inside. Was he met with foul play, was he lost in a drowning accident or did he commit suicide, the lead investigator settles on a completely different theory, Wiley had simply walked away from his life to start a new one.