Apparently, our friend Mike had a blog that he posted on a few times before his untimely demise. Someone gave me a link to it, but it had been taken down. Still, the URL itself gave me a couple of clues. It was http://www.thearchangelcomes.blogspot.com.
"The Archangel Comes." If that doesn't sound like some cult slogan, I don't know what does. Still, it's a shame the blog was taken down. It might have given me a few clues.
I still don't have any idea why they can't find the body, though.