 Patrick Binder died sometime during the last decade, according to his uncle, who was located by the "Washington Post" in 2015.The Binder surgery served as blueprint for similar twin separations, a procedure that was refined in subsequent decades.Carson participated in four subsequent high-risk conjoined twin separations, including a 1997 operation on craniopagus Zambian twins, Joseph and Luka Banda, which resulted in a normal neurological outcome.