This is over twenty years ago, in comparison to what you say & what I observed during my meetings with him. "Claustrophobic" rings a bell. I disagree with labeling him "bonkers". My first impression was that he was extremely withdrawn & depressed into despair. It took 2 or 3 attempts over a period of about a week,  to communicate with him before eliciting the reasons for his psychological despair. So, I took a look at his file. The State had 4 witnesses claiming to be the first on the scene describing two people in various stages of fighting outside of a bar. I read his pre-trial statement to his lawyer dated and stamped. At that point, I didn't believe him. I read further in the transcripts to the 13th witness, who knew neither person, was leaving the bar at closing time, didn't know if he was first or last on the scene, but he saw a third person with something shiny in his hand running away from the scene with someone holding Pitt from behind. What matters is, is Pitt innocent? Yes.