Via the Maddened Fowl, I learned that the RCMP actually negotiated with the Canuckistanian bus decapitator dude for three hours after they showed up.
Now, okay, I'm as big on due process of law as the next person, but when you show up at the stopped bus, and it's empty of passengers except for one (1) dead guy and a blood-covered guy with a knife in one hand, a severed noggin in the other, and some human flesh hanging out of his mouth... well, that's not a "suspect", okay? You've got your man, Mister Mountie. That's the guy, right there.
"Come out of the bus!"
Problem solved; taxpayers richer by whatever amount it's going to cost to house and feed and try this guy; gene pool a bit cleaner than it was yesterday. What's the big deal?