There are some interesting theories and discussions about the case on the /r/UnresolvedMysteries subreddit[0]. My favorite one is that she might have been part of a check scams league[1].

[0] https://www.reddit.com/r/UnresolvedMysteries/search?q=isdal&...

[1] https://www.reddit.com/r/UnresolvedMysteries/comments/3anykc...