As it should be.If this happens in my part of the world, they would be ripped apart literally.
Per the article, it sounds like he may be a pediophile predator. If so, and is convicted, sent to prison, he is going to have a very rough time in there, probably wishing he was dead.
It depends on the severity of the sexual assault. Could be anywhere from a slap on the wrist to real time.
Prisons have protective custody where a lot of the offenders are in for the same thing. 3 hots and a cot hanging out with other predators playing cards pretending like you aren't in there for the same thing does not sound like justice (to me).