the legal thing not the right thing... sometimes you can be technically correct and still do things wrong..
The cop should have:
a) told the guy that the ticket is only a receipt for a court date to dispute the charge, not an admission. (Before he asked the guy to get out of the car
b) told the guy he was under arrest before he tazed him
c) read the guy his rights (yes I know he did not have to do it at that moment but what would the harm have been)
Oh, for heavens sake. Cops never read rights until the criminal is cuffed.
You could not hear what the cop said due to traffic so your anger is based on your imagination.