I can't wrap my head around what would compel a seemingly normal 30 year old guy to do something like this. I don't really care what kind of personal issues he may have been facing, to do something like this is simply psychotic.
I hope he has a moment of clarity somewhere along the way and decides to open up and tell where she is. Frigid, snowy winter conditions are probably the biggest reason she hasn't been found yet.
I'm sorry that things went wrong when he made advances on her and she repelled him. But if he reads this thread tonight, and he still can by the way, I hope he'll stop making matters worse for himself while continuing to torture everyone who ever cared about this nice lady. She didn't deserve what she got, but there's still time for him to find the decency he was raised with and do the right thing.
He's still a free man and can read everything being typed here, but that isn't going to last forever. Rather than hide behind his lawyer and refuse to cooperate with the cops, he should try to make a deal and get a little leniency in exchange for ending this nightmare for her family. She will be found eventually, and if he forces the cops to do it the hard way, he's going to pay the ultimate price and won't get any mercy from the prosecutors office. 24 hours ago, none of us even knew about this guy. Maybe that had something to do with his hesitation to cooperate, I don't know. But now everybody knows about him, and if he thought the pressure was mounting before, he has no idea what is about to come raining down on him now.