After the perv is dismembered, the mother needs to be shot revived shot again and left to die.
What needs to happen to them is what the French did to the killer of General Jean Baptiste Kleber in 1800...They tied him to a tree and slowly burned his arm down to the bone (hmmm...I wonder if that hurt?). Then they impaled him up the ass on a post and left him to die, which I read took several hours. Then they shipped his head to France where his skull resides to this day in the Museum of man with the words “Criminal” written across the top.