IR's account is the most independent of them all, as all the rest are family and in regular contact with each other (presumably), and can contaminate each others accounts. GGP may have some memory issues, according to the sheriff, so if he's not really sure what happened and when, he might be somewhat suggestible and his version could easily be influenced by whatever JM, VDK and the rest of the family were telling him at the time. The sheriff said GGP gets frustrated when he doesnt remember and says yeah maybe it was like that.
IR said he hadn't heard from GGP all winter but he didn't really take any stance on whether GGP had heard from IR, whether he tried to call but GGP never replied or if neither one bothered to make contact. He said they used to go camping and fishing, did they normally do that during the winter?
I hope you're right and IR is going to be the star witness for the prosecution.
But even if GGP isn't consciously lying and isn't anticipating an obstruction charge, I don't think it's unusual that friendships change due to stressful life events . People who need extra oxygen tend to be in pretty bad shape and may not feel up to socializing much in the best of circumstances and GGP is elderly, lost a great-grandson, has had to deal with the police multiple times, and now his granddaughter is a suspect. The stress might have taken a big toll on his mental or physical well being , and dealing with friends or this particular friend who is a reminder of what went on on the trip might just be too much.
On the other hand, if he wasn't talking about the public, would he have used the words "the public"? He has no problem calling his friend Robert Walton when hes talking about him in other contexts.
http://www.eastidahonews.com/2016/01/isaac-reinwand-i-had-nothing-to-do-with-deorrs-disappearance/
He mentions social media reactions in a roundabout way several times in this interview and Nate Easton brought it up explicitly, asking him several questions about people being suspicious about him.
Maybe just an expression of general helplessness? It must have been quite a surreal, helpless situation. At one moment you're an unknown entity camping in the middle of nowhere and the next moment people are speculating about wild theories about you on the internet, and theres absolutely nothing you can do about it.
I don't think it's fair to draw the conclusion that GGP doesn't support telling the truth when we have never seen him or heard him give any statement and the sheriff has never said he thought GGP was lying, only the parents. He might be up to his neck in it , but it's not obvious to me, based on the information we have. No doubt he is not happy that JM and VDK were named suspects but I need to at least see the man and read a couple of quotes from what he said before I can state that he is intentionally covering for a murderer, or worse.