dr. bookbinder with jake paying for that sledge hammer the night before the attack. and after stabbing dr. weiss and being wounded in the struggle, jake picked up his cellphone, took this bloody selfie, and sent it to her. >> what is going through your mind when you took this picture? >> that i let down pamela. >> wow. this is riveting! >> can't make it up, guys! >> why did jake take the selfie at the crime scene? >> that is a really good question. he told me in the course of the interview that he was pamela bookbinder to say, what next? what do i do now? he says there was no exit strategy. we know he sent the selfie but we don't know if she received it and she never responded to that selfie. >> i'm still stuck on your cousin is your psychiatrist. what could go wrong there? honestly? i've never heard anything like that. >> i hadn't either. this was a live-in relationship. >> they were living together? >> they were living together at her apartment. jake claims in the morning she oftentimes would come into his bed. hired by the defense claims this is completely unethica

dr. bookbinder is another psychiatrist and jake's cousin. she and dr. weiss were battling over custody of their son. >> they hated each other. and, in turn, she made me hate him. >> reporter: jake says dr. bookbinder manipulated him to kill by filling his head with horror stories about her ex. >> by the end of this manipulation by dr. bookbinder, jake nolan had become weaponized. >> reporter: this doctor evaluated jake for the defense. he says jake is vulnerable daze he is mentally ill and suffering from bipolar and other disorder. >> he is a mess. he is such a prisoner of his mind, he can't get anywhere in life. >> reporter: and dr. bookbinder knew it because she was treating him. >> she morphed me into whatever just like a puppet. >> reporter: dr. bookbinder has not been charged with any crime. in court papers, she calls the claims against her utterly baseless and states, i never asked mr. nolan to attack or harm enter weiss. >> if you deny the footage that shows her in the home depot buying a sledge hammer. >> reporter: this surveillance footage show