William Henry McCarty (November 23, 1859 – July 14, 1881), better known as Billy the Kid, but also known by the aliases William Antrim and William Harrison Bonney, was a famous 19th century American frontier outlaw and gunman who was a participant in the Lincoln County War. According to legend he killed 21 men, one for each year of his life, but more likely he participated in the killing of less than half that number.
McCarty (or Bonney, the name he used at the height of his notoriety) was 5'8-5'9 with blue eyes, smooth cheeks, and prominent front teeth. He was said to be friendly and personable at times, but he could also be short-tempered and determined. This made him a very dangerous outlaw, when combined with his shooting skills and cunning. He was also famous for (apparently) always wearing a sugarloaf sombrero hat with a wide green decorative band. He was little known in his own lifetime but was catapulted into legend in the year after his death when his killer, Sheriff Patrick Garrett, published a wildly sensationalistic biography of him called 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.
In the autumn of 1877, Bonney (McCarty) moved to Lincoln County, New Mexico, and was hired as a cattle guard by John Tunstall, an English cattle rancher, banker and merchant, and his partner, Alexander McSween, a prominent lawyer. A conflict, known later as the Lincoln County Cattle War, had begun between the established town merchants and the ranchers. Events turned bloody on February 18, 1878, when Tunstall, unarmed, was caught on an open range while herding cattle and murdered. Tunstall's murder enraged Bonney and the other ranch hands.