This is his chance to finally make it right and get off the crooked path he's been on for a long time and just face the music and try to act like a decent human being instead of a monster. Not that it will bring Lori back, but it's his chance to start telling the truth and facing reality.
If he's still posturing and maneuvering to beat the rap, then except for being kind to the families so they can have closure (and maybe give Lori a decent burial), he's gonna morph into some other form of scum of the earth.
Frankly, I would be surprised if he was being entirely straightforward. I do hope he told all, and that he told it to his family rather than his doctors. What sort of irritates me is that he let this go on for so long--those poor searchers, volunteers and paid alike! Going through the landfill when they didn't need to should be punishable by burying him up to his ears in the same landfill!!
I think it's a bit too late for this monster to EVER turn into a decent human being. My heart goes out to the family of Lori. May she rest in peace.