Words & feelings... and shootings...
Or better yet CITIZEN! That might help the cops remember who they're dealing with on a day to day basis.
OK, I'll give you that that is indeed a better word for what we mean. However, don't expect the English language to change for us just because we think it ought to.
As to "them vs. us" feelings: It happens. It's inevitable. Any group you train with and spend time with will become "us," and everybody else will become "them." The nature of the group, or whether it's right or wrong to feel that way is immaterial--it happens, be "the group" a debating society, football team, rock band, ballet troupe, fire or police department, or the U. S. Marines. If it's never happened to you, if you don't believe me, try as an experiment, joining a community theater and helping to put on a play. After all those rehearsals, all that set painting, all that memorizing, all those hassles, culminating finally in the performance, you will discover that you have become part of an "us," and everybody else, including the chintzy grant granters, the audience, the advertisers, the theater owner, and the community at large, will be "them." Or sing in a church choir--in time, the same thing will happen, guaranteed. Frankly, I'd be worried about a police department whose members did NOT feel like an "us," i.e. a particular, well-trained, and mutually supportive group.
As to shootings, citizen or LEO, and statistics, may I respectfully suggest that each and every such incident is unique unto itself. Too many variables to try to compose meaningful statistics, except perhaps simple totals. Now, that doesn't mean that someone is not going to try to come up with some comparisons. I'm merely offering that those numbers, concerning something as unique and personal as being involved in a shooting, would be essentially meaningless.
As Winston Churchill observed, "Nothing in life is so exhilarating as to be shot at without result." (
The Malakand Field Force, 1898)