thanks for the advice guys, looks like judo might be the way to go and seeing as there is a judo gym clser than a BJJ one i'll look in to it
Now you're talking sports and not martial art adapted to handle physical confrontation in the line of duty. I'm sure the police academy will teach the most useful techniques to handle the most common situations but good stand up judo will certainly improve your chances of putting the suspect to the ground in order to cuff him. It's the most useful skill compared with the time you have to put into it. BJJ is better for taking your opponent out while on the ground and that might save your ass some day but you would want to avoid even being in that situation by all means possible.