Well how hard is it really? They were the ones leaning against their car fenders while children were being murdered.
Cops: "That shoplifter might have a gun, so I should shoot first for my own safety"
Also cops: "That mother ****** took an AR-15 into an elementary school after firing on us, so I should hang back and wait & see for my own safety".
God I hate cowards.
Well, it is pretty easy to run into active gunfire from the comfort of the internet. I imagine this isn't a situation they encounter daily.