Simply a shorthand way of describing him that you are trying to use to distract from the main point that this was a justifiable shooting because you have nothing to counter the juries verdict with.
The dead man was not a perpetrator of anything and was shot to death by a wussy little poseur with an AR-15 playing a warped game of Simon Says. I’d call it Kafkaesque but it’s just too damned stupid to rise to even that low bar. Yet, here you are, mouthing cop good “perp” bad like some mangy parrot. Careful, you might forget to breathe.