bucs90 - you are playing semantics. I haven't seen you defend a copy who has "committed a crime" (using the legal definition "committed a crime" = "being convicted"). However that is the very problem that many people have with policing....cops do bad things and are rarely held responsible for it.
Take for instance no-knock warrants. Especially those served to the WRONG HOUSE. As a citizen, I shouldn't be afraid that the police will bust in my door, throw my children to the floor, pull my wife out of the shower, and hold us at gunpoint for several hours....all because of a mistake. Worse yet, this can happen simply because they were looking for a non-violent criminal. YOU, however, would simply say "mistakes happen". I say police should ring the door bell, present the warrant, and I be able to let them in without having to replace my doorframe and have my wife/kids terrorized.
My 16 yo son likes to play with airsoft guns. He runs around the neighborhood shooting his friends. My biggest fear is NOT that he takes a pellet to the eyeball, it's that he takes a police officer's .40cal to his chest....like the kid on the playground in Cleveland. You defend the cop saying he (the cop) has to make split-second decisions. I say bullshit, he killed a kid with a pellet gun. We are not in Fallujah, and the cop is not a soldier. Hell, using that comparison, our soldiers who were in Fallujah had a more restrictive ROE than cops in Cleveland. THAT IS A PROBLEM that you don't even acknowledge.
So NO, you haven't defended a "guilty" cop, but you certainly defend cops who, by all appearances, have done things wrong.