They should have armed themselves.
I wonder where the other 90 bullets the police fired ended up? Other police shot and killed a man outside the Empire State Building a few months ago. No big deal. But those two cops also shot 9 innocent bystanders in the process. For the public safety that was in it. It seems there is no end to the firepower police seem to need; everything from machine guns, shotguns, extended high capacity magazines, tactical gear, etc. Would some pass/fail weapons training and fire discipline go amiss? If they shoot this badly it's no wonder they want a few hundred rounds on each patrol but perhaps instead we ought to limit them to black powder muzzle loaders instead and thus enhance the public's safety.