Police work across the border?
One thing has always puzzled me - in many American films the U.S. law enforcement seem to operate in Canada regularly. Being a European, I find it hard to believe that the Canadian government would allow police forces from the U.S. to enter Canadian territory as they please. I thought Canada was a sovereign state and not the 51st state of the USA. In this film it seems natural that U.S. law enforcement is going to pick up the murder witness from a cabin in the Canadian mountains, without the Canadian police present. How can this be possible?
I'd really appreciate if someone please could enlighten me in this matter.