Henry McCarty (November 23, 1859 — July 14, 1881), better known as Billy the Kid, but also known by the aliases Henry Antrim and William H. Bonney, was a 19th-century American frontier outlaw and gunman who participated in the so-called Lincoln County War. According to legend, he killed 21 men, one for each year of his life, but he most likely participated in the killing of fewer than half that number.
McCarty (or Bonney, the name he used at the height of his notoriety) was 5 ft 8 in-5 ft 9 in (173-175 cm) tall with blue eyes, a smooth complexion and prominent front teeth. He was said to be friendly and personable at times, and many recalled that he was as "lithe as a cat". Contemporaries described him as a "neat" dresser who favored an "unadorned Mexican sombrero".
These qualities, along with his cunning and celebrated skill with firearms, contributed to his paradoxical image, as both a notorious outlaw and beloved folk hero. A relative unknown during his own lifetime, he was catapulted into legend the year after his death when his killer, Sheriff Patrick Garrett, along with co-author M.A. "Ash" Upson, published a sensationalistic biography titled The Authentic Life of Billy, the Kid. Beginning with Garrett's account, Billy the Kid grew into a symbolic figure of the American Old West.