OMFG, remove seat belt request? icon_redface.gif

1) The officer grabbed the door to open it (probably not good, ask the driver to get out is more respectful)
2) The driver panicked at the officers move to open the door
3) The driver starts the car while trying to close the door
4) The officer panicked thinking driver was about to drive off
5) The officer shoots the driver in the head while the driver has car in forward gear
6) The driver gets as far as a block when car hits a pole, driver pronounced dead

Why didn't the officer let him drive off, then give all available unit chase? What ever happened to, "get out of the car please"?
He already had probable cause taking the Gin bottle from the driver