An 18-year-old was found dead on a Carnival Cruise ship – and now, the FBI is investigating. The woman, identified by relatives as Anna Kepner, died on the Carnival Horizon, which was on a voyage from Miami to the Caribbean, and docked back in Miami on November 8, when federal investigators boarded. The FBI’s involvement could be explained by federal maritime laws, South Florida accident and injury attorney Nick Gerson told CBS News, adding that the FBI's presence could also indicate concerns ab