ST. PETERSBURG — Officials are investigating the death of a 57-year-old man found in a boat behind his home. St. Petersburg Fire Rescue and the U.S. Coast Guard responded to a call at 12:23 p.m. Tuesday at 13090 Gandy Blvd. Officials said the man was living on the boat anchored outside of his home for a few months. A friend went to visit the man and found him dead. The Pinellas County Sheriff's Office will investigate the death.