There was a very high profile case in Ontario over a decade ago. Basically, the man went into an absolute psychotic state on the travelling bus and cut the head off a stranger while everyone else on the bus ran for their lives. A decade later, he's been released- under a lot of conditions and on a lot of medication, but people are very upset that he'd ever be free at all. In interviews, he's a very interesting person…
This is one of the biggest issues we have in this country, our prison system is used to make up for a lack of mental health care.