I just found an interesting website from Corrections Canada with quite a bit of history and photographs. There is a page that lists all of the executions in Canada, as well as a page that lists all of the peace officers (Corrections Officers) who died on the job. If you click on their photo, you will be taken to the story about their death. The most recent one is Lieutenant Alex Finkle from the Brantford Jail, who died in 2000 as a result of injury on the job.
A fascinating site for anyone who had corrections or peace officer ancestors.