Looks to me to be murder and dead guy responded with what he had to defend himself.
Gun is already in recoil.
Shooter must have already had gun out.
Spray lasts all of a second from other perspective....
Pretty good grip, RDS, not fucking around....
Expect escalation unless cops stomp this shit out.
Hmmm, wonder if gun is going back into battery.....shot than spray?
Yeah pistol def in recoil, it looks bang bang quick.
As someone mentioned, perhaps from the shooters perspective the sprayer appeared to be a gun?
Maybe there will be more video.
And yeah, rd equipped and his hold looks like he was experienced / had some training.