A timeline of events surrounding the killing of Sister Margaret Ann Pahl:

April 5, 1980Sister Margaret Ann Pahl's body is found in the chapel at Mercy Hospital. She had been strangled and stabbed in the chest and neck about 30 times.

April 9, 1980 — The Rev. Gerald Robinson celebrates Sister Pahl's funeral Mass.

April 18-19, 1980 — Robinson is questioned by police. He also is given two polygraph tests.

June 11, 2003 — A woman tells the Toledo Catholic Diocese that she suffered years of ritual sex abuse by diocesan and religious-order priests during her childhood. She mentions Robinson's name.

December 2003 — Authorities receive a letter about the woman's allegations and later reopen the investigation into Sister Pahl's death.

April 23, 2004 — Robinson is arrested at his home and charged in the slaying of Sister Pahl.

May 7, 2004 — Robinson pleads not guilty to an aggravated murder charge.

Dec. 31, 2005 — The Lucas County prosecutor's office reduces the charge against Robinson from aggravated murder to murder, saying the killing was not premeditated.

April 17, 2006 — Robinson's trial begins.

May 11, 2006 — Robinson is convicted of murder and sentenced to 15 years to life in prison.