William X. Kienzle (1928 - 2001) was a Catholic priest in Detroit, Michigan who published a series of mystery novels after leaving the priesthood.
William X. Kienzle was born on September 11, 1928 in Detroit, Michigan. He attended Sacred Heart Seminary College and St. John's Seminary. He was ordained in 1954. Fr. Kienzle served as a Catholic priest for 20 years. From 1962 to 1974, he edited the "Michigan Catholic." He was also pastor of St. Anselm Catholic Church in Detroit.
Kienzle wrote his first mystery novel, "The Rosary Murders," in 1979. That particular book was made into a movie in 1987 starring Donald Sutherland. Kienzle went on to publish a number of mysteries, which were set in Detroit and featured a priest detective Fr. Robert Koesler.
William's wife, Javan Kienzle, wrote a biography of her husband entitled, "Judged by Love: A Biography of William X. Kienzle.
William X. Kienzle died in December 2001.
(Source: Obituary for William X. Kienzle in the "Detroit Free Press," December 31, 2001. Obituary in "Los Angeles Times," January 2, 2002.)