What's with the claim there was only one shot? I pretty clearly see two muzzle flashes at the usual double-tap interval. Anyone else wonder if the guy was looking around for shell casings with that flashlight, and not just at the (unverified!) dead guy on the ground?
"The officer certainly didn't look surprised to me.
He also looked very calm and collected as he re-holstered his weapon."
To be fair, not everyone reacts the same, and some peoples' reaction is no reaction. He certainly didn't seem to pause or flinch as was claimed, though. I also don't think he intentionally shot the guy dead, because why would he? I tend to try to think through events like this with rational actors, vs. monstrously evil psychopaths.
I suspect he was all jazzed up from the hot pursuit (esp. the awesome bounce through the intersection near the end; the tax payers thank those struts for their valiant service to the community) and was focused on the dead body --fair enough-- as he approached the vehicle, when he noticed, amid all the blood and glare of headlights and flashers & blaring of sirens, a guy atop the car in his peripheral vision, and his snap-shooting instincts took over; double tap, before he could even catch himself. I get the feeling he wasn't even making rational decisions until some time after you see him wandering aimlessly about looking for something (I'm guessing shell casings).
Either that, or it's yet another case of an officer approaching a situation in ignorance with a gun drawn (the 'draw' maneuver could have been part of the standard contact as he approached the cab, and upon realizing the driver sitting up there he flinched or instinctively doubled tapped) when the situation did not yet call for it (just because you do not have full control or knowledge of the situation at first is not an excuse to go directly to one notch below lethal force)
TCB