Watch the video. The cop tells the kid 3 other people flashed their lights at him because his car is new and the lights are bright. So the cop knows this kid flashed him over defective equipment because he has pulled three other people over for the same reason. Yet he is going to go ahead and push the situation?
As for the injury. I find it highly doubtful a 17 year kid that is being tased could do that in that amount of time. And where is the dashcam video? Did that by coincidence also not work?
The dashcam worked, but wasn't in the position to capture anything other than darkness. Although the dashcam did capture audio of the 'suspect' being shot some 13 seconds after being tazed on the ground.
For anyone too busy to watch the video, yet with enough time to react

...I transcribed the section pertaining to several concerned drivers previously having been harassed/ticketed for alerting the officer to his overly bright headlights.
To be quite honest, reading the quotes back in text form makes the officer appear ever more like a perpetrator and criminal than upholder of justice.
Deven Guilford: You had your brights. I could not see. I was gonna crash. Because I could not see.... you had your brights on sir; I'm not lying to you. I was just doing that to be polite. I didn't want you to flash someone and have them go off the road and crash. You know?
Sgt. Frost: Do you realize that if you had complied with this traffic stop, it would have gone a whole different way for you.
Deven Guilford: And if I knew...
Sgt. Frost: Do you realize that?
Deven Guilford: Yes, I do but...
Sgt. Frost: Do you realize that I would have explained to you that I'm driving a brand new vehicle tonight. I have been flashed a couple of times because these headlights are new. I stopped a couple of vehicles tonight; you know people have gotten citations. But.... those headlights are brand new. They are brighter on that vehicle than on normal cars.
Deven Guilford: They are super-bright; you need to get new ones.
Sgt. Frost: But my high-beams were not on. That's what I would have come to explain to you.
Deven Guilford: Umm... I'm sorry.
Why is this officer wasting more taxpayer money by alerting drivers as to why his vehicle *admittedly* isn't up to code. Is this some sort of new speed trap and county revenue generator for belligerent officers in the force?
Not only that.. the officer also refused the request to tell/show his badge number, which is against the law. His badge number should be provided on demand. Again, it's all in the video.
If you see something... say shit.