Not to continually try to be the data police, but that graph title is bullshit, insofar as it does nothing of the sort. $1000 is not much money, certainly not enough to outfit a department with anything deadly. So maybe what the graph is really telling us is that PDs who ask for money are those that are more predisposed to being reactionary. I get that Chekhov told us long ago that if you bring a gun to act I, you better use it in act III. But the controls just aren't there to believe there's a causal link. The police can kill people pretty efficiently with hand guns...they don't need military money to buy hand guns.
That's the whole point. Departments in Georgia that engaged with the program in a non-trivial way were more likely to kill people. That's even why I pulled out that quote about the helicopter and its transmission - it isn't just the purchase of ex-military combat gear, it's engagement with the program at all. The adoption of a military footing leads to the adoption of a military doctrine. full stop.$1000 is not much money, certainly not enough to outfit a department with anything deadly.