PHILADELPHIA — A criminal defense lawyer was arrested after a sheriff’s deputy found him naked with a 14-year-old girl in a courthouse conference room, authorities said Tuesday.

Larry Charles, 49, has been charged with solicitation, attempted statutory sexual assault and related counts, said Lt. Dan Bagnell of the Police Department’s Special Victims Unit.

A sheriff’s deputy making his rounds in the Criminal Justice Center on Monday afternoon looked into a lawyers’ conference room on the third floor and discovered Charles and the girl, Bagnell said.