This achievement is pretty easy to do. All you need to do is get to the police station. At the back there is a hole which is the prison.
Just lick officers around the station and fling them in there. The goat and flamingo (which i used) were easy to escape the hole with must you fall in. Just try not to hit the spikes on the walls.
It goes without saying that you need to play on the Payday map and not Goatville.