" Their extended examinations of the prisoner led Hinsie and Glueck to the same conclusion. Irwin’s “fantastic delusional system” conformed completely to a personality pattern encountered “in patients whose diagnosis is unqualifiedly that of the schizophrenia-hebephrenia form. The murders were committed with the delusion that the accomplishment of this act would bring to the patient control of the universe which he had planned for so many years. Under the stress of these delusions and hallucinations, normal intellectual processes played no essential role. Therefore, Irwin at the time of the murders could not know the nature and quality of his act.” As the two eminent psychiatrists were now prepared to attest on the witness stand, Robert Irwin was “both medically and legally insane.”6 "

― Harold Schechter , The Mad Sculptor: The Maniac, the Model, and the Murder that Shook the Nation