A Bucks County man has admitted to leaving his mentally-challenged son alone.. the night a massive fire broke out.

Hugh McKavanagh has pleaded guilty to endangering the welfare of a child.

Investigators say McKavanagh's 15-year-old son was left alone when a fire broke out at the Racquet Club Apartments in Levittown back in July.

The boy is okay.

Investigators say McKavanagh was intoxicated in and around the time of the fire.

He faces up to five years in prison.