On October 27, 1969, Prosenjit Poddar killed Tatiana Tarasoff. Two months earlier, Poddar, a voluntary outpatient receiving therapy at Cowell Memorial Hospital at the University of California at Berkeley, confided his intention to kill an unnamed girl, readily identifiable as Tatiana, to his therapist Dr. Lawrence Moore.
Moore, with the concurrence of Dr. Gold who had initially examined Poddar and Dr. Yandell, assistant to the director of the department of psychiatry, decided that Poddar should be committed for observation in a mental hospital. Moore orally notified Officers Atkinson and Teel of the campus police that he would request commitment. He then sent a letter to Police Chief William Beall requesting assistance in securing Poddar's confinement.
Officers Atkinson, Brownrigg, and Halleran took Poddar into custody but released him after determining he was rational on his promise to stay away from Tatiana. Dr. Harvey Powelson, director of the department of psychiatry at Cowell Memorial Hospital, then asked the police to return Moore's letter, directed that all copies of the letter and notes Moore had taken as therapist be destroyed, and ordered no action to place Poddar in a 72-hour treatment and evaluation facility.
Poddar persuaded Tatiana's brother to share an apartment with him near Tatiana's residence. Shortly after her return from spending the summer in Brazil, Poddar went to her residence and killed her.
Plaintiffs, Tatiana's mother and father, filed separate but virtually identical second amended complaints against the therapists Moore, Powelson, Gold, and Yandell, the police defendants Atkinson, Beall, Brownrigg, Halleran, and Teel, and the Regents of the University of California as their employer. The first cause of action alleged failure to detain a dangerous patient. The second cause of action alleged failure to warn on a dangerous patient. The third cause of action sought punitive damages against Powelson for abandonment of a dangerous patient. The fourth cause of action alleged breach of primary duty to patient and the public.
The superior court sustained defendants' demurrers to the second amended complaints without leave to amend. The case reached the Supreme Court of California on appeal from the judgment of the superior court.
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