Or the alternative to that is we say that there is something extraordinary about civilian law enforcement that has caused it to be populated by an inordinate ratio of psychopaths with a low inhibition to killing.
There's been a lot of research on the difficulty of retaining quality officers through the 90s and early 2000's, and the subsequent drop in recruiting standards to compensate. Then you add in 9/11, and increased law enforcement budgets, further militarization of police culture on home soil as it suddenly felt like it could have terrorists running through the streets.....
It all adds up. You end up with people motivated to be police for the wrong reasons and they're not weeded out by better applicants.
We failed to put the brakes on the whole train post 9/11 for a lot of reasons (but mainly being labeled unpatriotic, disgracing the memory of fallen police officers or even being a sympathizer to Al-Qaeda's goals. "Do you want terrorists to blow up more buildings? WE NEED MORE POLICE!!11), and now it's become the de facto mindset of the country. And not even the stacked bodies of the last 5 years of police unlawfully killing people has changed course. Police are well aware they're being watched and scrutinized, but it's only seemed to have impacted police culture in that they just quietly say it's under investigation rather than trying to defend their officers in public. We still have a bunch of shitty, unprepared, trigger-happy cops on the streets who, at the end of the day, would rather be alive and wrong than right and dead, and who are in such a goddamn hurry to react and respond that they don't even take a minute to establish what the situation is at the scene before they've drawn their guns and are ready to fire on the first person they see.
Put like that you can't really blame them as people.....but they shouldn't be police officers, because they're reacting like scared, untrained civilians. Christ that last killing where they literally walked in to a bar and shot a security guard that had disabled the actual shooter......just unfucking believable.