He and his minor killing criminal buddy's should never see the light of day again. 
Since the 1970"s, research has consistently reported childhood cruelty to animals as the first warning sign of later delinquency, violence, and criminal behavior.  In fact, nearly all violent crime perpetrators have a history of animal cruelty in their profiles.  Albert deSalvo, the Boston Strangler found guilty of killing 13 women, shot arrows through dogs and cats he trapped as a child.  Columbine shooters Eric Harris and Dylan Klebold boasted about mutilating animals for fun. Jeffrey Dahmer: "In a way I would be more worried about the person who in secret captures animals and tortures them. Jeffrey Dahmer did that. As a youngster he would capture animals and torture them," he says.
Dahmer eventually became one of America's most notorious serial killers. He was sent to prison in 1992 for killing as many as 17 people.