A fourth Somali man has pleaded guilty to piracy for his role in the hijacking of a yacht that left four Americans dead.
Burhan Abdirahman Yusuf pleaded guilty in federal court in Norfolk on Monday.
He is among 14 people from Somalia and one from Yemen facing charges related to the February hijacking of the yacht Quest.
The owners of the Quest, Jean and Scott Adam of Marina del Rey, Calif., along with friends Bob Riggle and Phyllis Macay of Seattle, were shot to death after being taken hostage several hundred miles south of Oman.
Yusuf faces life in prison at sentencing, although that may be reduced as part of a plea agreement. Court documents show Yusuf identified several men who he says shot the Americans.