New details on a fisherman found dead in the Gulf of Mexico last week.

Autopsy results show he died of a heart attack and Cameron county constables are identifying the man as 74 year-old Raul Gonzalez of Brownsville. The fisherman was reported missing by the captain of the Matilda Tower ship about a week ago. Four hours later, the U.S. Coast Guard found the man's body and the FBI says their investigation continues.