Alright so, let's break it down one by one per point.
so i robbed this cop . which i can . what would i do else in CNR server obvisouly i m there to rob if i'm robber so i sit in his bike as passenger robbed him and then i couldnt exit his car cause he was driving (must have happen with u guys as well)
Yes it does happen to me sometimes, though I usually avoid sitting as passenger with a cop in the first place so this doesn't happen.
he was driving i shot so that he would stop and and i can leave his bike . but he came out of his bike and *he was very close to me* rules mentioned *he try to tazer/arrest me* rules mentioned ...
In this situation you are not allowed to shoot the cop because you want him to stop the vehicle, that is already a cophunt.
As flyburger mentioned, he get off from his bike to self-defense against you because you shot him.
He was very close indeed, but YOU are the one who get close to him not the cop after you gain wanted level. Use some common sense.
And you have a similiar infraction like this situation which is killed a player for no reason after robbing him, you repeated your mistake, you didn't learn from it, hence the infraction is valid.
I won't lock this topic yet because you wish to reply, so go ahead.