Is Stupid A Medical Condition?

So, Paris Hilton was released from prison after serving a tiny fraction of her sentence. Why? The excuse given was that the release is due to a medical condition. I was not aware that stupid is a medical condition.
Even if there is a legitimate health concern, would a non-celeb be released because of it? Hardly. You tell me if a poor black woman was serving a sentence, what chance would she have of being released due to a medical condition?
How could anyone have faith in the American justice system?