Michael Joseph Swango (born James Michael Swango, October 21, 1954) is an American serial killer and licensed physician who is estimated to have been involved in as many as 60 fatal poisonings of patients and colleagues in the United States and Zimbabwe; he admitted to causing four deaths. He was sentenced in 2000 to three consecutive life terms without the possibility of parole and is serving his sentence at ADX Florence at his own request.

William Leonard Pickard (born October 21, 1945) is one of two people convicted in the largest lysergic acid diethylamide (LSD) manufacturing case in history. In 2000, while moving their LSD laboratory across Kansas, Pickard and Clyde Apperson were pulled over while driving a Ryder rental truck and a follow car.