In April 1987, after securing a search warrant for Harveys apartment, investigators found a mountain of evidence against him: jars of cyanide and arsenic, books on the occult and poisons, and a detailed account of the murder, which he had written in a diary.  Following this new discovery of evidence, Harvey was arrested on one count of aggravated murder, and after filing a plea of not guilty by reason of insanity was held under a $200,000 bond.  The evidence against Harvey was