Also, he only shot twice, according to the several reports I read.
How did the police come up with three words on three casings?
If he had a Failure To Feed and racked the slide, a live round would eject. Two shots plus one live round ejected on the ground equals three casings.
The video looks like it was filmed with a potato. It's difficult to tell if the shooter had Failure To Eject (FTE) issues, Failure To Feed (FTF) issues, or both.