If you look on the details of their crimes, then yes. You can see who has charges of sexual battery and criminal confinement in addition to molestation vs what was charged as coercive sexual activity or child seduction.
And I'm sure for some of these cases, the whole story isn't even known because the offender was only charged with what LE could prove or it was pled down.
Look at this case from neighboring Howard County, IN. IMO this person was looked at for the Delphi murders as he was a registered sex offender in the tri-state area (in Kokomo) when Abby and Libby were killed and IMO they immediately looked into all sex offenders. I'm not going to use his name here because LE never named him as a suspect in MSM but this is from the court record on Justia of his appeal. This man should never have seen the light of day but he was out and working at an automotive plant in Kokomo during the time frame the Delphi murders occurred.
The victim,(redacted), was eleven (11) years old at the time of this incident. 

posed as a police officer to gain the confidence of (victim) and, after getting her in his automobile, detained her there for a period of three and one-half (3 1/2) hours. He used a knife to threaten her and induce her to do what he wished. He admitted he tried to have sexual intercourse with her. He also inflicted cuts on her throat, stomach, and wrists. The record of the guilty plea hearing revealed that 

had committed similar acts...
So this is what I'm thinking of when I say that I hope JBC is the one, but I have to acknowledge he's not the only sexual deviant in the area who has done a similar crime and who could be capable of this. Disturbing but sadly true.