How to get Wanted Achievement easily

Well, today i spent some time playing Skyrim with that bloody 1.2 Patch that bugged me a lot of things. So i decided to kill all guards from whiterun and everyone that would dare to face me. Finally i leaved the city and talked with the 2 guards at the door and asked to go to prison. When i got there, there were no guards watching, why? Because i killed them before going to prison and easily escaped from there.

tl;dr - Save before and kill all the city guards (except the ones outside the city) ask them to go to jail, easily escape. Now you have some points to show your family who is the Dovahkiin