Actually it is old rule - don't cophunt.
You had nothing to do with the crime scene, you didn't even RP. You were just following criminals and cops for few mins and when opportunity arise you picked him up. Clear cophunt.
Now, ofc, you didn't know that is not allowed and that is not cop hunt. That is pure RP I guess. Just like few mins before the ban you didn't car ram suspect car.
Then you started with classic - "I wanted to help my friend" and "what if friend ask me to help him I am not allowed to?"... Funny how your "friend" never asked help from you...
On side, that you already have some recent punishments from A-Team that are noted. And I am sure by your behavior there were few more that weren't recorded...
You were unbanned on 14th May and by 26th May you manage to do few major rulebreaks... I mean, what is your purpose on server? We can't babysit you everyday and watch what is the next s*it you are going to do...