She looks like she is bipolar in a manic phase. She could definetly have psychosis with that. Look at those eyes. I also thought I read that she appeared to be starving herself. Manic people have to be practically forced to eat. I don't know how this helps, but I guess if we are using a mental illness when we are searching we should look for Bipolar disorder too.
I wonder if she was starving herself do some type of delusion she had. If she herself put the tape on the tent saying "no go, no eat, no drink, murder.
also:
"he tent contained many books, including two Bibles, a Busy Womens Journal with several scriptures noted and Harry Potter."
..quite possibly religious delusions of some sort; they can be common with some of the mentally ill.
"The only thing the Coroners Office knows for certain is the woman once received high-quality dental work. The Coroners Office is hoping a dentist somewhere may recognize her face and remember performing the work, Gamble said."
If she was mentally ill; then there is a chance she was hospitalized somewhere before she was released. Most state mental hospitals also provide dental work on the patients; if she was in a more expensive private hospital; the work may be even better. LE might want to check into that as well.
"The woman is believed to be in her 40s. An anthropology report places her age between 33 years old and 46 years old. A dental report estimates her age anywhere from 25 years old to 40 years old."
Her dental work places her 6-8 years younger; she would have had to have been keeping up with her teeth since she had got the dental work done.
She might have been released from a hospital sometime before she was found. If her teeth were in that good a condition; i don't think she'd have been on the streets very long.
(qouted parts from link below)
http://www.smdailyjournal.com/article_preview.php?id=68330