Herald story this morning regarding the incident and the cancelled exams:
http://www.canada.com/calgaryherald/...3-b6aec6bc6de6
Also as a side note, you'd be surprised at just how many university students are involved in that circle of people.
I'm not saying these targets are innocent, but a lot of the time, they're targetted because of association. The individuals don't actually deal in illegal activities, organize assaults, etc. but socialize in a circle where some of the people do.
Still not the smartest on their part though... more often than not, you're assumed to be who your friends are.