From what I've heard it was night and the passangers were asleep, so by the time people found out that this was happening the victim was already probably dead and he would just be a threat to other passangers. They did the right thing by leaving and no more people were killed.
The suspect worked at Edmonton Sun and was delivering papers. He claimed he wanted to go to Winipeg for a job interview. He told his wife a different story, that he wanted to go there to deal with some family matter. He didn't pick up his July paycheque from the newspaper and went on that bus, then this happened. No previous criminal record. This guy doesn't fit into any stereotypical profile of a killer other than having a McJob at 40 years old. I cant figure out a motive for this unless he was into some dark stuff and just decided to pick on someone he felt was not going to fight back.
The victim was into carnival and enjoyed travelling and never been in a fight in his life. He has a great circle of friends that are all standing up for him here, and doesn't appear to have done anything to have provoked this attack. I've read a report here in Toronto of a guy saying 'hi' to a stranger on a bus then getting stabbed for it. Well, here is a guy that didn't say anything, and was minding his own business and he got picked on...so in either case you cant win with a psycopath.
There is no reason for that 40 year old to go that far on a 22 year old unless he was into something dark like the occult or devil-stuff and just got possessed and lost his inhibitions. People may appear to have normal lives (other than this guy having a Mcjob), but you don't know if they are secretly watching torture porn or some other sick stuff, or are just sadistical barbarians, or what they are into. I know you cant support a family and house and food on McJobs like that -- and I don't know how far to speculate on that.