If the dog got clumsy and fell off the roof of the building, would there be much paperwork on that?
It has always been all about you weapon and the fact that liberals are in charge at high levels.
If you fire a round from your weapon (in the line of duty), get ready to spend some time filling out endless forms and being interviewed by a reviewing officer. All this time, you are away from your beat and leaving that area nearly unprotected for several hours and your sense of duty starts getting to you.
I'm hoping it has improved since then (couldn't have gotten worse), but it seems more productive to have a patrolman on his beat and responding to calls than spending all that time writing up reports.
The "dog off the roof" angle would have worked perfectly because all the witnesses were disgusted by his attack.