I alluded to that in an earlier post - she must be really sick to injure herself to that degree. However, she had the presence of mind to smear "KKK" on her car. That's evidence that she was cognizant of her actions (mens rea, in legal terms), which is one of the criteria for assessing sanity.
Originally Posted by yossarian
We're going to have to agree to disagree on that point. I think it's merely evidence she can write the letters "KKK." What caused her to do so is another matter.

Disassociation and psychosis are real. I guess maybe because a friend went through this I have a better grasp of these concepts. Whenever something is in the news like this, I am struck by how people don't understand these very real symptoms of mental illness.