Otto apologies if you already know this, but I couldn't tell how much of the history of the case you'd read. In a very brief nutshell in terms of the players in the case, Erin was married to Jon Corwin. She was having an affair with her accused killer, Christopher Lee, who is in jail. Christopher is married to Nichole Lee. The two couples were neighbors in an apartment complex at one point. There is also a woman who runs the horse sanctuary where Erin, Christopher, and Nichole all volunteered and went out to ride. I got the impression Jon was supportive of her riding hobby and volunteering but just wasn't that into the horse thing himself.
It seems the affair was over, or at least everyone thought it was, but Erin went out with Christopher that day, theoretically to go shooting in the desert (which makes me shudder every time I think about it) to "celebrate her pregnancy."
In the desert area where they were going shooting there are a ton of abandoned mines, and she was ultimately found in one of them after they searched "over 100 mine shafts" with cameras. I don't think we know for sure what led them to eventually search the mine she was found in given how many there are. I think some of the comments about immunity are related to the speculation that maybe Nicole knew where Erin was, and led LE to her.
I'm a little fuzzy on the timing but at some point Christopher and Nicole moved into a house on the ranch property temporarily before their planned move to Alaska. There was also an early conversation between Nicole and Isabel (the "horse ranch woman") where Nichole said something about "detectives would never find her body" and also basically "no body, no crime." After the horse ranch property was searched, Isabel also allegedly said that detectives "missed something" in the garage.
There are a lot of good links in the media thread, but this one in particular has links to news stories including all of this info:
http://www.websleuths.com/forums/sh...ines*-*No-Discussion*&p=10783595#post10783595.
I'm not up on every detail of the case by any means so I hope someone else will correct me if I got anything wrong and add anything else pertinent (and again sorry if this is a repeat for you - I don't remember seeing you posting earlier in this thread but I could've missed it).