Lets not fool ourselves; troubled kids can straighen out their lives, just as easily as good kids can turn into criminals.
What ever happened to cops taking a perp down old-school, tackling him to the ground and taking his knife from him, throw in a couple slaps in there if needed, I don't care? If you seen the vancouver airport video, the cops walked up to the man and in less than 1 minute they tasered him. Was he really that threatening? Is a 17 year old kid, that must have been scared s--tless so intimidating to grown "trained" men and woman that they need to taser him?
I am not trying to blame the cops, maybe they did do everything they could with the 17 year old but they definitely did not with the polish man.