schwartz believes that chapman's mental illness began in childhood. >> mr.pman became seriously withdrawn at about the age of 9 or 10. it was about that age that he began imagining a whole world of people, little people. in the living room. in the walls of his living room, and he was their emperor, their commander. and it was my clinical assessment that he was both a paranoid schizophrenic as we understood the definition in those days, and suffering from bipolar disorder. i truly believe that when he went after john lennon, he was suicidal. john lennon was himsel h himse. he believed that if he would kill himself, he would be reborn, in killing lennon, he was killing himself. >> mark david chapman at that point was a walking shell who didn't ever learn how to let out his feelings of anger, of rage, or disappointment. mark david chapman was a failure in his own mind. he wanted to become somebody important, larry. he didn't know how to handle being a nobody. mark david chapman struck out at something he perceived to be phony, something he was angry at, to beco