Shaver's family's lawyer Mark Geragos described the shooting as 'an execution pure and simple.
Brailsford said he fired his AR-15 because he believed Shaver was grabbing a handgun in his waistband.
Police told Shaver to exit his hotel room, lay face-down in a hallway and refrain from making sudden movements - or he risked being shot.
New disturbing footage of the encounter shows the moment Shaver, sobbing and crawling towards the officer, audibly begs 'please don't kill me,' before Brailsford opens fire and shoots him dead.
Brailsford is pictured in court on October 25 at the start of the murder trial The shooting occurred in the Phoenix suburb of Mesa when officers were responding to a call that someone was pointing a gun out a window at the La Quinta Hotel.
Shaver is pictured with his two daughters In the video he can be Shaver can be seen sobbing and lying on the ground as he starts to inch himself forward.