If you’ve ever had the occasion to shoot any living thing, let alone a human, unless you can turn the lights out with one in the brainpan, the target simply does not instantly stop most times.
However.......from eight feet and wounding nine others...
Of course NY cops I bet are almost never exposed to stress such as scenario based IDPA, IPSC - USPSA type action shooting.
Unless they have been actively involved in combat, IDPA, IPSC or USPSA a once a year static qualification on a stationary paper target is woefully inadequate - as the results in this shooting have demonstrated.
This one did. Dropped like a poleaxed steer.