I have no idea what so ever what might or might not have happened in this case - but I do want to remind folks that sexual abuse can be any number of things; some of which would not result in jail.
In some states (I don't know about Utah) just talking about sexual matters with a child in a way that equates to an attempt to humiliate or degrade a child is sexual abuse - but its a misdemeanor, not a felony.
Felony child abuse can result in prison, and will involved some degree of touching - tho not necessarily rape.
However, apparently there are also cases that do in fact include rape, that don't result in prison, as I know of a man who confessed to raping/molesting both his young step daughters, and his only consequence was forced family therapy and being court ordered out of the house until the girls were 18.
How such things can be in this day and age, I don't know, but I personally know these people and this is what was.
One of the girls now has a young daughter and her Mom (and so her step dad) baby sit. There is no count order protecting this child. As the pedophile gran pa was never convicted in criminal court there is no sex crime registry that names him and no agency watching him.
And so, we see that Justice is indeed blind.