Chicago psychiatrist Richard Rappaport had been hired by David Hendricks’s defense lawyers to assess Hendricks’s mental condition. Dr. Rappaport, who had gained some notoriety as an expert witness in the John Wayne Gacy trial four years earlier, wound up becoming prosecutors’ sole witness in the sentencing hearing in which they sought the death penalty in the murders of Hendricks’s wife and three children.
Rappaport testified that he detected borderline personality disorder in Hendricks and that Hendricks may have had a brief psychotic episode. He specifically noted “an almost completely unemotional, affectless mood and demeanor.”
Psychologist Michael Campion had found Hendricks mentally healthy. During a recess in the sentencing hearing, Dr. Campion was asked about Hendricks’s apparent lack of emotion.