The Azelle Rodney trial has heard evidence from the cop accused of his 2005 murder.
Anthony Long testified in his own defence last week. He denies murder.
He said he fired eight shots, two striking Azelle in the top of his head, because he feared Azelle had picked up a gun. He said he had not seen him with a gun in his hand.
Azelle was a passenger in a car in north London being followed by the police, who believed the occupants had weapons and were planning to rob drug dealers.
Azelle was sitting in the rear seat of a Volkswagen Golf as Long pulled up alongside him in an unmarked police car. Other police cars boxed in the suspects’ vehicle.
Long told the court, “All I had was seconds to make the decision whether I was going to let my colleagues be shot by someone with a submachine gun or whether I was going to take life.
“I chose to take his life. That was the decision I made and I stand by it.”