I saw the video. Looks like the officer with his weapon drawn is just casually following behind the suspect. The suspect walks all the way across the car, opens the door, but seems to be reaching into the car, rather than trying to sit in the car, when the shots are fired. Meanwhile a woman is screaming and jumping up and down almost the entire time. The suspect is clearly not in his right mind.
When the suspect starts reaching into his car, that may have required a split second decision to save the officer's life.
But much like the Tamir Rice shooting, poor tactics eliminated the possibility of better outcomes. They probably could have tackled him and started getting the cuffs on before he got anywhere near the car.

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