All you need is one pet owner out of 12 to hang the jury. Happens all the time.
You're assuming that all pet owners thinks like you. I own pets but I definitely do not think like you. If someone murder a man I will make sure that they pay for it.
It does not take unanimous decision to put someone to jail for manslaughter. That's only for the death sentence and maybe some other high punishments. (I might be wrong on this one because I'm not a lawyer.)
I don't need to explain anything since I know there are others out there who knows exactly what I am talking about. Why should I try to convince you guys of anything? It serves me no good to do so and therefore I am not going to try. My words would fall on deaf ears anyways.