I have no illusions about the glory days when some men in blue didn't do horrible things, but as I've written before, I do think that there was a time when a cop shot someone it meant something had gone wrong. Encounters were supposed to be non-lethal. Cops were supposed to de-escalate violent situations. Pulling the trigger was a last resort.
Again, I'm not saying I think there was some glorious past when police malpractice was appropriately dealt with on a consistent basis, just that there was a public sense that shootings meant something went awry. Now it's enough that a cop "shoots a bad guy" and everybody (#noteverybody) just shrugs.