Yes, people do kill horses everyday, in a variety of ways for a variey of reasons.
Anyone who would electrocute or otherwise torture them to death them is a scumbag…no matter what his name is or his motive was.
The insurance fraud is just the reason they went to jail, the killing by torture is what no one should ever forgive.
Scumbag is just my term, I believe that psychologists have a more technical term for people who torture animals.