In 2005, based on results from the DNA research, Jackson's involvement was revealed in the following murders: Sonya Higginbotham (19), killed in June 1975 in Auckland; Ann Johnson (27), killed in August of that same year in Montclair; Cynthia Waxman (11), killed on April 22, 1978 in Moraga; Henry Villa (62) and his wife Edith (59), killed on November 22, 1981 in Albany Hill; Betty Grantzweig (37), killed on December 4, 1982 in Auckland; and finally, Gail Slokam (34), killed on December 8th of that year, also in Auckland.