Dr. Gonzo

Dr. Gonzo is Duke's insane attorney, who is a surrogate of Oscar Zeta Acosta. He is usually seen behaving on a level slightly above that of a wild animal, constantly on drugs, and looking for trouble.

What is interesting is that he seems to have a lack of ability to care about what's going on around him most of the time and if it does indeed effect him, it is profoundly negative.