Four observations:
1. I've watched the video.....the minute that the cops have confirmed his ID, and are moving to get him out of the car, he's acting a certain way for about 30 seconds, then decides 'what the heck, I'll just escape'. This triggers the cops reaction.
Why the escape deal? He's got a warrant for a situation over a aggravated armed robbery. Just a humble guess, but with some friendly DA.....he's still going to prison for a year.
For the cops, the minute they realize the warrant is for aggravated armed robbery.....that means a weapon was being used someone at the robbery. This pumps up all three cops to a level of 'worry'.
2. On the female cop (Potter), the taser should have been a shoulder weapon....NOT on the belt. I'm not saying it matters that much, but you have to make a decision and reaching for your belt (left or right)....shouldn't be a thought proccess.
3. Convicting Potter (the cop)? I could see some lesser sentence of three years, but not fifteen years. The jury? Hard to say.
4. Finally, to the idea of some 20-year old doing something 'extra-stupid'.....getting into a robbery? I look at this behavior and just suggest that he was going to die sooner or later....in some act. You had someone who just wasn't an adult.