Ya know...much as I hate to say it....but I think the cousin is totally unrelated to all of it. I could be wrong. It's possible...and we do not know...that when the police questioned the cousin and he admitted that "yeah I took the van" and he gave an accounting as to where he was at with the van and the investigators went and verified where he was. So he may not have ANYTHING to do with the missing status of Haleigh.
I think now I am more convinced than ever that the "black man" that JR said he saw (of which I believe he stated that)...is the man that Misty had over the house that evening. Haleigh would not have gone off with strangers or let anyone strange pick her up from a middle of sleep without fighting and screaming. Did you see the pics of her on first day of school? She was dragged kicking and screaming. That child was afraid of new people, new places and the dark. And a child that intimidated would not sleep through being picked up and relocated. No, I believe she knew who she was going off with and who is to say she was even put to bed at 8pm anyhow? Whoever took her could have taken her right out the door at 8:15 pm and she wasn't even asleep at all.
I got the same vibe, Lavanda Dolce, from the cousin. I can't see him being directly involved with whatever happened to Haleigh. Also, his name seemed to have come up in a red-herring-esque, after-thought sort of way from Misty, imo as a sort of deliberate mis-direction.
I guess it's not impossible that the cousin could have perhaps "removed" some thing or things for Ron and/or Misty or at Ron's behest; but even that seems sort of unlikely unless the gain far, far out-weighed the risk for him.