A coroner said a great white shark probably killed a teenage body boarder at a central California beach.
The Santa Barbara County coroner's office made the announcement after conferring with Ralph Collier, president of the Shark Research Committee and author of Shark Attacks Of The 20th Century.
Mr Collier said the shark that killed 19-year-old Lucas Ransom was 17 to 18ft long and weighed possibly 4,000lbs.
He based his finding on witness accounts, facts gathered during the investigation, and measuring the distance between teeth marks on the board.
Surf Beach, where Mr Ransom was killed, reopened on Monday.