I think what you're talking about is referred to broadly as critical incident stress management and more specifically as critical incident stress debriefing. There's a lot of discourse going on about those areas right now.
I know that the RCMP does engage in some debriefing. It doesn't happen for the RCMP or for any other organization after every single event that might be considered traumatic; doing that would be logistically impossible.
As for the efficacy of doing that, we just finished a fairly large review of critical incident stress management and critical incident stress debriefing and peer support models and implementation across the country for public safety personnel, specifically our first responders. The evidence in support of or against any specific model or even broadly speaking is actually extraordinarily limited at this point.
We're not saying that it doesn't work and we're not saying that it does work; we're saying that when people ask us whether they should do these things and which ones work, the best answer we have is that the research is limited and we don't know yet.