The video I saw shows something in the kid’s hand and then a gun on the ground.
The gun, presuming he had it is on back side of fence, about 6-8 or more feet away, and shown well after he died. Further, it was in slide-lock, obvious to anyone with firearms experience. Still doesn’t change the fact that as shown in the video as he was shot, he was following the officer’s instructions, hands up, open, and facing the officer when he was shot. That’s on the officer.