On December 23, 1981, the State of California filed a complaint in the Riverside County Municipal Court charging Robert Diaz with 12 counts of murder and seeking the death penalty. The complaint alleged that Diaz, a nurse, murdered 12 patients by administering massive doses of the heart drug lidocaine.
The preliminary hearing on the complaint commenced on July 6, 1982. Diaz moved to exclude the public from the proceedings under Cal. Penal Code Ann. § 868 (West 1985). The Magistrate granted the unopposed motion, finding that closure was necessary because the case had attracted national publicity and "only one side may get reported in the media."
The preliminary hearing continued for 41 days. Most of the testimony and the evidence presented by the State was medical and scientific; the remainder consisted of testimony by personnel who worked with Diaz on the shifts when the 12 patients died. Diaz did not introduce any evidence, but his counsel subjected most of the witnesses to vigorous cross-examination. Diaz was held to answer on all charges. At the conclusion of the hearing, petitioner Press-Enterprise Company asked that the transcript of the proceedings be released. The Magistrate refused and sealed the record.
On January 21, 1983, the State moved in Superior Court to have the transcript of the preliminary hearing released to the public; petitioner later joined in support of the motion. Diaz opposed the motion, contending that release of the transcript would result in prejudicial pretrial publicity. The Superior Court found that the information in the transcript was "as factual as it could be," and that the facts were neither "inflammatory" nor "exciting." It concluded that there was nonetheless "a reasonable likelihood that release of all or any part of the transcripts might prejudice defendant's right to a fair and impartial trial." Petitioner then filed a peremptory writ of mandate with the Court of Appeal.
That court originally denied the writ but, after being so ordered by the California Supreme Court, set the matter for a hearing. Meanwhile, Diaz waived his right to a jury trial and the Superior Court released the transcript. After holding that the controversy was not moot, the Court of Appeal denied the writ of mandate. The California Supreme Court thereafter denied petitioner's peremptory writ of mandate. The United States Supreme Court granted certiorari.
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