Treasure hunter marks five years in jail for refusing to give up his gold

Research scientist Tommy Thompson has for years refused to tell the location of 500 missing coins found in a historic shipwreck

A former deep-sea treasure hunter is about to mark his fifth year in jail for refusing to disclose the whereabouts of 500 missing coins made from gold found in a historic shipwreck.

Tommy Thompson, a research scientist, isn't incarcerated for breaking the law. Instead, he's being held in contempt of court for an unusually long stretch - well past the normal maximum limit of an 18-month internment in cases of witnesses refusing to cooperate.