I'd guess the officer is already in their own hell of regret or second-guessing, and perhaps also PTSD from the event itself.

Instead of making the officer a target for outrage over the event, why not instead focus on learning what can be learned from this event, including with the help of the officer?

If someone wants their pound of flesh, it's not like the officer hasn't likely already suffered and won't keep punishing themself. And it's not like further punishment needs to be seen for some kind of deterrent effect.