YOUNGSTOWN, Ohio—A Roman Catholic bishop in Ohio has appealed for information from former students about alleged sexual abuse by a Franciscan brother who killed himself after the allegations emerged.

Bishop George Murry of Youngstown said Monday he has sent letters to about 1,200 adults who attended John F. Kennedy High School in Warren from January to June 1978 and August 1985 to January 1992, while Brother Stephen Baker taught and coached there.

The 62-year-old Baker was found dead of a self-inflicted knife wound at the St. Bernardine Monastery in Hollidaysburg, Pa., on Jan. 26, 10 days after the disclosure of financial settlements in 11 alleged abuse cases at Kennedy.

Since then, claims also have emerged at Bishop McCort High School in Johnstown, Pa., where Baker also taught and coached.