Boyle was the chief of Michigan State Police during the investigation of the several murders in the town. Detective Amanda Fisher witnessed the death of her partner and was pulled off of the case by Boyle. She wouldn't listen to her chief and went after the main suspect alone. The suspect was Ash Williams.
Later, she was able to capture Ash and made a phone call to Boyle. He went over to the bar where she held him captive, but he got possessed by the Kandarian Demon and killed several innocent people. He then was killed by Ash.