Based on this article, he does not sound like a threat to children. The woman he was accused of groping or whatever was 19. The conviction is probably not even on the books anymore back in Iowa.
Still, you are right.
Also from the article, "Haag said he was working at a facility for developmentally challenged people when a 19-year-old woman on a field trip tempted him," and he was 28 at the time; (not a 'youth', in my book) and she MAY WELL have been one of his charges on an outing.
His phrasing makes it sound like it was a woman visiting the facility as part of a field trip, but the phrasing is ambiguous.