I guess when the bullets started hitting him, he knew the game was up. Was he wearing a vest, I wonder?
Maybe she did not make any kill shots. Maybe she just wanted to disable him.
He must have been hit by at least one shot. Most reports have Ms. Assam emptying her gun at the perp while walking towards him in the hallway.
He was definitely down, and then perhaps shot himself fatally. The fact that he was taken down by that brave woman is not in dispute.