Soccerstar, I did some research. No mention of a gun. He was sentenced in 2000 to 13 years. It is now 2013. Now, what tells you how dangerous they believe he is...he served 100% of his time. There is a lot of truth to the argument that they have to live somewhere.
Now, that being said, if this guy is that dangerous, he will just have to live with people knowing who he is and what he did. If that means he takes beatings, than those are consequences of his actions. I am not sure I am on board with our government being given the power to put someone away just because anything. The reason is that given the power with pedophiles, government will do what government always does...expand its powers. Forcible abduction and rape should have a longer sentence than 20 years. That is what I would focus on.
God grant me
The Serenity to accept the things I cannot change,
The Courage to change the things I can,
And the Wisdom to know the difference.