I think that's an interesting explanation, but I don't think it aligns with the evidence. If that were the explanation, then what you would see is lots of police officers shot in urban centres but not dying, in contrast to police officers being shot in rural areas and dying. I don't think there's any evidence to support that.
The last police officer who was shot and killed in Toronto, for example, was Todd Baylis in 1994. There have been three police officers since then killed in the greater Montreal area. But if you look at the other 20 or 30 who were killed, it's Lac-Simon, it's Edmonton, RCMP, RCMP, RCMP, RCMP, Kativik, OPP, RCMP, RCMP Saskatchewan, RCMP Saskatchewan, Windsor, Laval—I would count that as part of the greater Montreal area—RCMP, RCMP, RCMP, RCMP.
If you look at the geographic breakdown, the explanation is, frankly, that often police officers go on calls, and in those communities they're more likely to be going to a home with a firearm. If you look at the circumstances under which police are shot and killed, it's typically not in a shootout with a gang in an urban centre. It's typically someone who's disturbed in the midst of a domestic violence incident, or someone who's suicidal, or in some cases, for example in the case of Mayerthorpe, someone who had a beef against the police. We saw that in Moncton, as well.