He was the last of the defendants to stand trial, with other gang members having received prison sentences ranging from 10 to 30 years. Almost 4 years later, the footage has been released to the public.
Angilau, who is believed to be a member of the Tongan Crip gang, ran towards the rival gangster testifying and attempted to attack him.
A video released Monday shows the fatal shooting by a USA marshal of a defendant who rushed a witness stand at a Utah federal courthouse. Angilau lunges headfirst over the witness stand with his arm raised, ready to strike, and narrowly misses Tenifa, who swivels around the back of the witness stand.
The female USA marshal, named only as Jane Doe, then fires four shots, killing Angilau.
Local and national news outlets have spent years fighting to get footage of the shooting publically released, but the USA department of Justice has pushed back, saying the TCG could retaliate in an attempt at revenge.
Angilau's family sued the court, with attorney Robert Sykes saying Angilau had ceased hostilities after leaping into the witness box. In March 2018, a federal judge ordered the footage be released - in the same decision, he dismissed the family's wrongful death suit.
The judge in the case declared a mistrial, and the US marshal was later cleared of any wrongdoing.
The judge wrote in a statement: "The video completely contradicts the plaintiffs" argument that Angilau stopped posing a danger within less than one second of launching himself over the witness stand while making a stabbing motion with a pen in his hand'.
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Dramatic footage from a fatal courtroom shooting in Salt Lake City, Utah was released by a federal judge on Monday.
"Drop the pen out of your hand". He also noted that the defendant was already on the ground when the Marshall fired the final three shots, CBS News also reported.
Skyes said: "There was no need to use deadly force".
An investigation launched into the incident found the officer, who was not named, was legally justified in using the force he did.
Sykes said he's glad the video was made public, but the Angilau family wants justice.
The Department of Justice wanted the video kept under seal over concerns it could lead to retaliatory gang violence. As he was on the floor, he was shot four times (in quick succession) by a nearby police marshal.
According to CBS News, Angilau was one of 17 people listed in a 2010 indictment accusing Tongan Crip members of assault, conspiracy, robbery, and various weapons offenses. Faces of the judge, attorneys and jurors are blurred out.