SALT LAKE CITY (AP) — The FBI says a defendant has died after being shot by a U.S. marshal during an attack on a witness during a trial in federal court in Salt Lake City.

The FBI said 25-year-old Siale Angilau died Monday at a hospital. The agency says Angilau was shot in the chest as he rushed the witness with a pen in an aggressive, threatening manner.

Authorities said Angilau, who had not been restrained in the courtroom, was shot several times in front of a jury that had been selected on Friday.

Angilau was one of 17 people named in a 29-count racketeering indictment filed in 2010 accusing gang members of assault, conspiracy, robbery and weapons offenses.