What is the state of the law on expert testimony on schizophrenia?

We reject defendant's contention that trial counsel should have presented expert testimony on schizophrenia. Aside from a "social history report" prepared by a paralegal and attached to defendant's sentencing memorandum, defendant presents no declaration setting forth the substance of any mental health expert's proffered testimony. Thus, his claim that a mental health expert "would have bolstered [his] defense considerably" is mere conjecture and "'unsubstantiated speculation.'" (People v. Bolin (1998) 18 Cal.4th 297, 334.)

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