My apologies I have deleted 1 post by accident whilst I was deleting 3 other posts that were off topic. I didn't notice who's post it was so please excuse me for my mistake. These things can happen from time to time but once again I'm sorry for deleting it by accident.
Also on topic now:
Unfortunately there is no rules against searching a player, it's the cop's choice to do so. I understand this may be frustrating but honestly until a new rule comes into place there will be no justice done.
My proposition for a rule:
As a cop you can search anyone that has over 25 hours on the server.
As a cop, you're not allowed to use "rebel items" which I'm presuming is a lockpick/lockbreakers, I tried it once myself, I just got a message saying "You should be preventing crime, not starting it." or something in that style. Someone with him out there most likely helped him get inside. I had many other players help me get into people's houses when I was a cop and they were terrorists using "rebel items".