sentences:  Current club president David Santillan denies that the club as a whole is a criminal enterprise, and attorneys (not members) for the club claim that it has changed its code of conduct to exclude drug abusers and criminals.In 1998, Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) agent William Queen infiltrated the club, eventually becoming a full-patch member and rising to the rank of chapter vice-president using the undercover alias of Billy St. John.In April 2000, based on evidence gathered during Queen's 28-month undercover time with the club, 54 Mongols were arrested.