Fr. Arthur J. O'Brien
- 1983: Ordained
- 1983-1984: St. Pius, Bowie, MD
- 1984-1985: Christ the King, Daphne, AL
- 1985-1987: On duty outside the diocese; assigned to Kalihi parish
- 1987-1988: St. John Apostle and Evangelist, Mililani Town, HI
- 1988-1989: St. Rita, Haiku, HI
- 1988-1989: St. Gabriel, Keanae, HI
- 1989-1990: Cathedral of Our Lady of Peace, Honolulu, HI
- 1990-1991: Unknown
- 1991-1993: Office of the Clergy
- 1991-1995: Special Assignment
- 1995-2003: Retired
- 2003-2004: Leave of Absence
- 2005-2011: Unknown
- 2011: Deceased
Notes: It is believed that Fr. Arthur O’Brien began sexually abusing young males as early as his time in seminary. In 2002, a man came forward stating that Fr. O’Brien, while still in seminary in Boston, MA, sexually abused him when he was 14 years old. In 1984, Fr. O’Brien was accused of sexually abusing a boy in Maryland. Fr. O’Brien was removed from ministry and ordered to undergo treatment.
In 1985, Fr. O’Brien was assigned to a parish in Hawaii. In 1989, Fr. O’Brien was indicted for sexually abusing a 10-year-old boy who did yard work at St. Rita’s on Maui where O’Brien was assigned as a pastor. Fr. O’Brien was criminally charged with sexual assault. In 1992, he pleaded no contest to the charges and was given a six-month suspended jail sentence and placed on five years of probation. A detective investigating the case, and other Maui families, noted that Fr. O’Brien had sexually abused other young boys, but the survivors were unable to come forward. While the conviction forced Fr. O’Brien’s removal from active ministry, he was allowed to remain a priest and lived in the Diocese of Honolulu as a retired priest. In 2002, he moved from Hawaii to the mainland. It is believed he may have been living in Florida until his death in 2011.