My guess is that they're psycho evaluating her like Michael hinted at. I think she often assumed the role of "healer" before her drinking days began. ("Healer" meaning the person who talked to someone if they were having a hard time dealing with a situation or needed to work through feelings/vent, etc.) Now, it seems as if she's amidst her own inner struggle. I wonder if part of it is that she spent too much time helping others confront problems, neglected her own inner struggles and is now paying for it. Or maybe she did just have really bad alcohol poisoning, and like reaper239 mentioned, needed some serious time to shake it. I do definitely get a suspicious feeling with the Ft. Irwin crew, though. Hopefully we find out soon! I really want Riley to come out of it and get back to kicking arse with her bow again.