It could be that this is reflective of tougher inforcement as opposed to a higher overall rate of incidence.
As an example that is somewhat comparable, I know my home state is derided as some sort of hotbed of political corruption of late, because an unusual number of politicians, sheriffs, etcetera are under indictment or serving time. NC isn’t anywhere near Nevada, Illinois or Louisiana in this regard, though.
Or, it could be that there actually is a higher rate of incidence due to some unique aspect of the state of Utah. Just thought I’d point that out in the interest of fairness.
I think it's a combination of both. At least I know they tend to keep sex offenders longer in jail than most/many states.