Chilling footage from inside a bowling alley shows the moments after a gunman opened fire at a birthday party, claiming multiple victims.
People can be heard crying in anguish, while a woman lays over a motionless victim screaming for help.
The man, who looks to be in his 20s or early 30s, is laying sideways across a small flight of steps and surrounded by people desperate to help.
Officers can be seen cutting off his blood-soaked t-shirt with a pair of scissors as the woman continues to scream and cry.
"Someone call his f****** baby mumma please," she says.
A witness, speaking to Mirror Online, said: "I counted six or seven shots."
Another told the LA Times they heard nine shots.