He only realized that someone had been inside the portable toilet once he opened the door to look inside, Capt. Johnson said.
Man dies after being found in burning porta-potty in College Park, Md. →
Preliminary investigation indicates the man, who suffered severe burns on his upper body, likely started the fire himself though it was unclear if the blaze was accidental, said Capt. Stanley R. Johnson of the Maryland-National Capital Park Police.