William Queen is the author of the New York Times bestseller Under and Alone and Armed and Dangerous. He spent twenty years as a special agent with the U.S. Department of the Treasury, Bureau of Alcohol, Tobacco and Firearms. A Vietnam veteran, Queen devoted his career to law enforcement, serving first as a local police officer and then as a U.S. Border Patrol agent before joining ATF. He is among the country's foremost experts on the violent world of outlaw motorcycle gangs and has lectured widely to law-enforcement organizations in multiple countries. For his ground-breaking undercover work playing the part of biker "Billy St. John," William Queen was awarded the 2001 Federal Bar Association's Medal of Valor.