The U.S. Postal Service is now leading the investigation and told KPIX-TV that Richard Tillman is the brother of Pat Tillman. U.S. Postal Inspector Matthew Norfleet told the outlet that the motive for the alleged arson is under investigation. Photos from the scene show the words "Viva la me" were spray-painted on the front of the building.

The brother of late NFL star and U.S. Army Ranger Pat Tillman is being held in custody in connection with a vehicle driven into a post office on Sunday.