I’m curious how that compares to other violent and dangerous jobs (ie, military, prison guards, etc) and other country’s law enforcement.

If the US or job is higher that could be a serious problem that they need to look into (if it isn’t already, which I doubt). There has to be more to this than the police are just over-selecting for evil people.

Although the US has to be one of the highest numbers of police dealing with people with weapons. I remember the WaPo database of police shootings showing that almost all of them (95%+ except one or two involved people with weapons). Adding all the people who didn’t get shot but still had a dangerous weapon, that can have some PTSD. Which famously rears its head in many unexpected self-destructive ways.