Guy is definately a scumbag and deserves the worst possible punishment imaginable.
However- the government should have no part in it. The prison system is not retribution, i.e. the revenge arm of the government. The idea of the penal system is that when someone breaks the law, they create an imbalance in society and that imbalance must be fixed by a penalty and preferably "correction" of the wayward citizen. This is why the naked lady holds the scales blindfolded in courts, they weigh punishments and judgements.
IMO part of the problem with our society and why we have such a vibrant, powerful, regenerating criminal element to our society is because of our prison system. It's called the "department of corrections" but does anyone get corrected? No. You go in when you're 15 for stealing a car and come out 3 months later a hardened criminal for life. No lessons of any human value are learned in a federal prison these days other than killing pays.
Many have the quaint idea that pedophiles get what they deserve in prison, thereby making it a great place to throw bad people as a way to sidestep the governments unwillingness to torture people. Remember, the moral certainty of any overcrowded, violent prison is amazingly tainted by evil. The inmates that run it are usually the most violent, horrible people imaginable. Guys who kill multiple girlfriends, beat up women, rob banks and kill innocent people, they generally rise to the top of prison society.
Even if the pedophile gets let out of confinement, which he probably won't, the barbarous gang of thugs will probably be more focused on trafficing drugs, male prostitution, contraband etc etc They may also be preying on one of the many innocent people who get put in prison every year, this has also been proven time and time again.
The publics eagerness to get violent criminals put away quickly has led to thousands of lapses in court's, police and prosecutors judements and has led many innocent people to get put away for life and the death penalty.
As much as you may thirst to see this guy, or any other despicable persons blood spattered on the ground, that is not the intended purpose of our government. Capital punishment doesn't deter crime. It's turned into a sick revenge mechanism to quench the peoples lust for vengeance. Pretty F'd up if you ask me.
I'd still enjoy to see that guy strangled, allowed to get conscious again, strangled again, over and over. I just don't think that or anything else worthwhile will be done to him in our current prison systems.