SAN FRANCISCO (AP) – A suspected computer hacker made his first court appearance Wednesday after being indicted on charges of breaking into computers belonging to NASA and the U.S. departments of energy, defense and transportation, said federal prosecutors.

Max Ray Butler, 27, of Berkeley was ordered held on $100,000 bail during the hearing in San Jose. On March 15, he was indicted on 15 criminal counts, including unauthorized access of a computer, recklessly causing damage and interception of electronic communication.

All the counts carry sentences of at least six months and fines of hundreds of thousands of dollars.

Butler, who also goes by the name of Max Vision, had been an FBI source, helping agents solve computer crimes, authorities said. He turned himself in on Tuesday.