Murder of Margaret Ann Pahl

[citation needed] Robinson was convicted of strangling and stabbing Pahl, who was 71 at the time, in the sacristy of a chapel of the hospital where they worked together.

A book describing how to perform the satanic black mass was also found in Robinson's possession[citation needed].

The chief of the criminal division in the Lucas County prosecutor's office, Dean Mandros, stated that when detectives were questioning the priest two weeks after the killing, Deputy Police Chief Ray Vetter, who would later testify that he was a practicing Catholic, broke off the interview, against all normal procedures, and allowed a monsignor to escort Father Robinson out of Police Headquarters, which "upset the detectives to no end".

Forensic tests indicated a sword-shaped letter opener that had been found in Robinson's apartment and stored without detailed examination was consistent with the weapon that inflicted the wounds; in the words of the prosecutor's expert, it could "not be ruled out".

In April 2012 he again applied for his conviction to be quashed,[10] but in February 2013 the Ohio 6th District Court of Appeals confirmed the denial of Robinson’s petition for post-conviction relief.

[12] The case is described in the book Sin, Shame, And Secrets: The Murder of a Nun, the Conviction of a Priest, and Cover-up in the Catholic Church by Toledo journalist David Yonke[4] and in the "Alphabet of 'New' Evil" included in The New Evil: Understanding the Emergence of Modern Violent Crime by Dr. Michael H. Stone and Dr. Gary Brucato.

Investigation Discovery Network series The Lake Erie Murders devoted the episode "Black Sabbath" to the case.

The case inspired an episode of Law & Order: Criminal Intent, entitled "The Faithful," first broadcast on October 17, 2001.