I have been pulled over by cops many times, sometimes justified sometimes not. Latley though it took the cake, they followed me for about 1.5km, so I decided to wait on the a red arrow, hoping the long line of cars would make them loose intrest. When the arrow when green about 10 cars got through, but I didn't, this time I was 3rd in the line with the cops still waiting behind me. Next green arrow I got through, again about 10 cars got through, but the cops pulled me over, expected, but what was unexpected was they charged me for going through a yellow arrow. It was definatly still green when I was halfway throught the intersection, I am 100% about that. I argued, but he just said, take it to the courts. I don't have time for the courts and I doubt I could defend myself against them anyway even if I did. If I take it on the chin it will be the second time I have to and I only have 3 points left. Such is life
But in your case grabbing you by the throat is just unexceptable, he should be taken down.