If it was flagrant and damages are obviously there I could see it prosecuted as grand theft or trafficking in stolen goods. Could also fall under computer fraud

If it was flagrant and damages are obviously there I could see it prosecuted as grand theft or trafficking in stolen goods. Could also fall under computer fraud and abuse act or wire fraud statutes depending on what he did. But IANAL. It's also possible that he did other things to gather or sell secrets that are criminal-- wiretapping, theft of private communications, entering offices when people aren't there, etc.