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. The laboratory had been stored near a renovated Atlas-E missile silo near Wamego, Kansas. Gordon Todd Skinner, one of the men intimately involved in the case but not charged due to his cooperation, owned the property where the laboratory equipment was stored.

On July 27, 2020, Pickard was granted compassionate release from federal prison 20 years into his sentence.

The Drug Enforcement Administration (DEA; ) is a United States federal law enforcement agency under the U.S. Department of Justice tasked with combating drug trafficking and distribution within the U.S. It is the lead agency for domestic enforcement of the Controlled Substances Act, sharing concurrent jurisdiction with the Federal Bureau of Investigation, the U.S. Immigration and Customs Enforcement, and U.S. Customs and Border Protection. The DEA has sole responsibility for coordinating and pursuing U.S. drug investigations both domestically and abroad.