While I will admit that anything is possible, I do not think that CR has anything to do with Haleigh's disappearance. It is nothing more than my opinion.
CR spent 7 years out of his 10 year sentence in prison, didn't he? He was very young when he committed his crime. His offense included burglary with a weapon (knife) and during the burglary he used the knife to cut the panties of an 11 year old girl, then fondled her. This makes CR become an RSO.
Okay, Haleigh is five years old. Six year difference between his prior victim and Haleigh. This does not mean CR would be attracted to a five year old.
Now, some of the speculation is that CR may be acting for and with Haleigh's mother's side of the family and taking Haleigh for one of them - actually CS. Why would CR risk going back to prison for the remainder of his original sentence, plus some time added to it for violating his parole? CR is still young and had a job. He had finally gotten out of prison. Seems he had the support of his family after seeing pictures. Why would he risk his freedom as well as hurt and disappoint the family that stuck by him when he was in prison?
Of course every possibility has to be looked at when a child is missing and endangered. I am just one person who believes that CR had nothing to do with Haleigh's dissappearance. LE has stated that they do not believe it to be related.
As far as CR being missing, IMO he met with foul play, or either met up with an ex-inmate he had become friends with and simply split!