Looked like cop was waiting for the described truck to come by. .
Cop knew him by name so that tells me the guy was a known offender, and he was almost certainly serving an arrest warrant on him.
Looks completely justifiable to me. You keep your ****ing hands in the air, or do exactly what the cop tells you to do when he has a gun drawn on you. What kind of dumbass, or either violent person with intent to not be apprehended reaches for something when a cop is screaming with a gun on them?
I don't think people can really say a police officer overreacted when they haven't seen what cops have seen. Nor know the offender, and situation he was dealing with.
If evidence comes out otherwise, I'll concede the cop acted overzealously. But even then, he was within every right to open fire, and shoot to kill when you see a suspect reaching for something after being told NOT TO DO THAT.