David Gerard O'Connell KC*HS (July 16, 1953 – February 18, 2023) was an Irish-born prelate of the Catholic Church who was an auxiliary bishop of the Archdiocese of Los Angeles in California from 2015 until his murder in 2023.

[2] He was ordained a priest for the Archdiocese of Los Angeles on July 10, 1979,[1] at All Hallows by John Scanlon, the Ireland-born Bishop of Honolulu.

[3] After his ordination, O'Connell served as associate pastor at three parishes in Southern California: St. Raymond in Downey from 1979 to 1983, St. Maria Goretti in Long Beach in 1983/84, and St. Hillary in Pico Rivera from 1984 to 1988.

Police found O'Connell dead from multiple gunshot wounds to the back of the head at his home in Hacienda Heights at approximately 1 p.m. PST on February 18, 2023.

[6][10] On February 22, Los Angeles District Attorney George Gascón reported that Medina had confessed to murdering O'Connell.