I think sex crimes are much more character defining. Personally, I dont think there are many who push themselves toward violence and murder. Sure there are those okay with violence and psychos that kill for pleasure but nowhere near the level of sex crimes.

I also think that violent people can be rehabilitated whereas sexual deviants can only hide from themselves.

I dont think a single instance 40 years ago is enough to hold someone to account today but if it were sexual I would not believe it were a single instance.