New Delhi, July 25 -- The brother of late NFL star-turned-soldier Pat Tillman will undergo a mental competency test before his trial on arson and vandalism charges, a judge ordered Wednesday.

Richard Tillman, 44, of San Jose was arrested after he allegedly rammed a car into a post office in a San Jose, California, strip mall around 3 a.m. Sunday. He then set the car on fire inside the building, which went up in flames, San Jose police said. No injuries were reported.

During his arraignment Wednesday, his attorney raised doubts about Tillman's ability to stand trial. The judge ordered a competency test and set bail at $135,000.

Tillman, with a long beard and shoulder-length hair and his hands in handcuffs, waved at television cameras as...