COLUMBUS, Ohio (AP) — A former deep-sea treasure hunter is preparing to mark his sixth year in jail for refusing to disclose the whereabouts of 500 missing gold coins. Defendant Tommy Thompson has been held in contempt of court since mid-December 2015. That’s when federal Judge Algenon Marbley found Thompson had violated a plea deal by refusing to respond to questions about the coins. Thompson says he’s already said everything he knows about them. The coins were minted from gold recovered from the S.S. Central America, which sank in a hurricane off South Carolina in 1857. Thompson’s latest hearing was scheduled for Jan. 7.