I don't know what rock you are living under. Cops are trained to defend themselves. They are not no martial arts type but they are not no walking "chins" waiting to get punched either.
I can't comment on how the cop got snuffed by X because I wasn't there just like you can't say that the cop wasn't looking when he got chin checked because you weren't there either. You are going by assumption.
All I know is that it takes massive BALLS and GREAT stupidity for someone to smack a cop regardless if the cop is looking or not, and it could be the most fruity pop, defenseless, cry baby tinker bell a-ss cop... But it's because of the CONSEQUENCE that comes with putting your hands on a cop.
Don't get me wrong, I'm not trying to stick up for X, I still believe Zman has a bit of an edge here due to him going the extra mile by training... I just thought it was funny that you think that a cop is defenseless without a gun. Also that you have this assumption that the cop was looking the other way when he got snuffed.