Federal prosecutors have unsealed an indictment charging multimillionaire San Francisco financier Robert F. White with traveling to Thailand and Mexico to molest and exploit children. The grand jury indictment, reported by The Chronicle in April, accuses the 68-year-old White of conspiring to violate the so-called child sex tourism law. That law prohibits traveling from the United States to other countries to have sex with minors, even if the sexual activity is legal where it took place. He also is charged with conspiring to produce child pornography.