You have a lot softer heart than I do, BGroom
I was thinking more like 6mo in the desert. START by breaking all his toes, ripping out his teeth, beat him about the stomach and chest with a 16# sledge. Then let him heal a little, then start some real torture (So I've read a few western novels that involved Apaches, so what?). TIe him to a cactus with wet rawhide, leave him there a week. stake him out face down on a fire ant hill. PUllout his guts about 3ft, and let the coyotes get him; chase them off, let them return tomorrow night. (Ok, that one came from "Lonesome Dove") An hour is not nearly long enough. Make him WANT to go back to prison.
BUt after only 8 years, the memory will stil be fresh enough in the memories of the family of the kid for stuff to work out right in the end.

Sounds like that one guy has the capability to do it. (the one who called him a "scumbag") THat is, IF he survives prison. My uncle used to be a guard here in the States, and people who were child molestors, abusers, etc, didnt last too long. They often fell down a flight of stairs, slipped and hit their heads in the shower, "accidently" drowned somewhere.
BUt, the penalty for taking up the slack of the "justice system" is probably more severe than for the original offenders.
Daniel