Federal postal investigators are working to figure out why a car slammed into a neighborhood post office in San Jose,

Richard Tillman has been charged with arson and vandalism in the alleged attack on a San Jose building over the weekend; his arresting officer turned off Tillman’s livestream of the incident.

The brother of the late NFL player and U.S. Army Ranger Pat Tillman is suspected of driving into a South San Jose post office early Sunday morning, officials said.