>> we call it an unresolved eo -- oedipal complex. a child can grow up with this emptiness inside of them. >> to top it off, the defense continued, hilton was self-medicating with prescription drugs. >> ritalin and effexor will basically push you over the line. >> the defense then treated jurors to gary hilton, this is your life. a saga of abuse, neglect, and injury. it included an audiotape of hilton's late mother talking about how as a teenager hilton had wounded his stepfather. >> he said, shoot me, shoot me! go ahead, shoot me! i dare you to shoot me. gary shot him. >> in the legs or -- >> the lower part of his stomach. >> a junior high girlfriend testified that gary wasn't a bad guy back in the day. >> he was funny and outgoing and smart. >> the defense rests. >> once the defense rested, willie megs called his rebuttal witness, a clinical psychologist to revisit the essential issues. >> did mr. gary hilton know right from wrong?