According to this article, she doesn't get haircuts or styling:
http://articles.orlandosentinel.com/2011-06-15/news/os-casey-anthony-clothes-20110615_1_casey-anthony-trial-inmates-jail-officials-bag-lunch
I wonder what kind of clippers--the kind used for shaving? Hedge clippers? Nail clippers? Sorry, I just can't imagine what kind of clippers someone would use to trim long hair. I think it explains why only her bangs have been cut in three years. Her hair really does not seem remotely "styled" to me, just pulled back.
She's also allowed to buy mascara, lipstick, and eye pencils through the commissary.
I really believe she should have the right to make herself look presentable, even pretty, in court; no matter how guilty most people believe she is, she is as yet still considered innocent until convicted. A shaved head and shackles would, I think, be quite prejudicial. (I know that's hyperbole, but still--the total dehumanization can begin after she is convicted.
I think all the accused should get some dignity during trial; not all are guilty, after all.)
As for the fact that she might be
failing to look pretty--or that she certainly looks different from three years ago--I suspect that simply comes from being jailed for three years. I've never even been inside a jail, but I've seen and met a recently released ex-convict or two. In my experience, no matter whether inmates are allowed some comforts and conveniences, something about being removed from the public and living behind bars--well, I've found that that in itself can have a hardening effect on the appearance. In other words, I think it ages you, no matter your crime. It really is not easy, even if you believe they receive some comforts they shouldn't.