Some people are just far worse than animals (animals tend not to be that sick/nasty)... People who do this sort of thing should be locked up and they should throw away the key - safer for all of us.
It's times like this when "prisoners rights" and "rehabilitation" mean absolutely nothing - a grungy cell and a bowl of porridge a day is more leniency than someone who would do something like that deserves...
It's just so sad for the family that there last thoughts of there family member are clouded by the evil of somebody else. You can only pray for there peace of mind and justice for all.