In his new book, Billy the Kid: The Endless Ride, historian Michael Wallis traces the life of America's mythic outlaw. Born Henry McCarty in 1859, stories of the kid first showed up in Silver City, Colorado. In 1877, Henry - already known to some under the alias Kid - shot a man who was bullying him and began a life on the run. The Kid was eventually gunned down by Sheriff Pat Garrett in the New Mexico Territory at the age of twenty-one, but not before helping define a new breed of celebrity outlaw. Larry talks to Wallis about the Kid and other criminals of the old west.