They appear to be either mentally ill and/or prone to fabricating outlandish stories to make a relevant & interesting comment. The 10 years in jail story is rather consistent, though, so I wouldn't be surprised if it was true and perhaps related to their... odd comments.
I think almost anyone that ends up in jail is somewhat mentally ill. I've seen various statistics concerning the mental illness of confined persons, but the percentages seem low compared to my personal experiences from being inside.
Most sane people will not commit a serious crime or put themselves in a position where they are arrested and have to fight to prove their innocence.
