Pre-trial
Felony Court Judge Herbert J. Paschen appointed an impartial panel to report on Speck's competence to stand trial and his sanity at the time of the crime. The panel of three physicians suggested by the defense and three physicians selected by the prosecution: five psychiatrists and one general surgeon. The panel's confidential report deemed Speck competent to stand trial and concluded he had not been insane at the time of the murders.
While awaiting trial, Speck participated in twice-weekly sessions with part-time Cook County Jail psychiatrist, Dr. Marvin Ziporyn. These continued after Speck's transfer from Cermak Memorial Hospital (inside Chicago's House of Corrections) on July 29, 1966 until February 13, 1967, the day before Speck was transferred to Peoria to stand trial. Ziporyn prepared a discharge summary with depression, anxiety, guilt, and shame among Speck's emotions, but also a deep love for his family. It went on to note an obsessive-compulsive personality and a "Madonna-prostitute" attitude towards women. Ziporyn maintained Speck viewed women as saintly until he felt betrayed by them for some reason, after which hostility developed. He also diagnosed organic brain syndrome, resulting from the cerebral injuries suffered earlier in Speck's life, and stated he was competent to stand trial but was insane at the time of the crime due to the effects of alcohol and drug use on his organic brain syndrome.
Ziporyn did not testify for the defense or the prosecution as both sides were troubled to learn before the trial Ziporyn was writing a book about Speck for financial gain. Ziporyn also earned the ire of the Cook County Jail, which fired him as its part-time psychiatrist the week after Speck's trial ended. At some point during his interviews with Speck, Ziporyn had obtained a written three-sentence consent from Speck authorizing him to tell "what I am really like." Ziporyn's biography of Speck was published in summer 1967.
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