This is old news now, of course, but this great interactive map gives an insight into homicides in Montreal in the modern era. The CBC interactive map, with points for all the 28 homicides in Montreal for the year of 201. If you want to now more, each of the map pins has a link to the story of the death on the CBC website.
These are only those related to deaths on the island of Montreal. I was a little surprised it was only 28. Not that I feel Montreal is a dangerous town, but that just doesn't seem like much. This is of course a good thing.
Another thing to note, in game terms, is that they are spread around the city, making no one borough more dangerous than any other.