This issue came up in a thread several years ago. A police officer in New York identified a guy as an escaped murder convict and shot him when he started to run. Escaped convict survived, and question was whether NY state use-of-force doctrine allowed the officer to use deadly force. Answer seemed to be that yes, it was allowed under NY law. Escaped convict had killed before, and therefore it was reasonable to use deadly force to stop him.
Out of curiousity, I asked a Crown prosecutor here in Canada if Canadian use-of-force doctrine would allow an officer to shoot in the same circumstances. His off-the-cuff answer was no, it wouldn’t, for at least three reasons: there was no evidence that the convict was posing immediate harm to anyone; there was no evidence that the convict was armed; and the officer didn’t have personal knowledge of the accused, and was just relying on a picture for id.
See @Loach 's comment at post 11 in that thread, and my comment right at the end.
The thread is over here: