The numbers bring up interesting points. There are 4 main factors IMO that cause police to kill people:
1. Improper police conduct. That's what everyone loves to jump on, on both sides of the argument. While this does certainly contribute to deaths caused by police, I would wager this is actually one of the smaller, if not the smallest of the listed causes of police killings.
2. Inadequate staffing and funding. If a cop is just given a gun and a car, he's a lot more like to have to shoot then if he has a partner, more police backup nearby, nonlethal options, and protective gear. They need to feel and actually be safer, it makes them less likely to shoot.
3. Inadequate or improper training. If you train a cop to shoot first, what do you expect him to do? You need to train cops to diffuse situations with as little violence as possible. The military seems to do a much better job of this, which I find odd considering they are most often dealing foreign, armed combatants.
4. Armed populace. I'm not saying this to rag on the second amendment, I support it, but it has a cost and this is one of them. Cops have to worry about guns constantly, and it can be easy for them to mistake something for a gun when we have more of them than pets. Beyond this, it also increases the likelihood of criminals having guns. In countries were guns are highly restricted, police don't have to deal with this nearly as much, which is why many of them seem to lack the hair-trigger response US police do.
Only #1 is controllable by the police themselves. Administration mostly has to take care of #3, and we the people have to address #2 and #4.
