Billy the Kid is one of the best known characters of the Old West. Unfortunately, parts of the his life have been built on legends.
Basically, Billy was born in the east and moved west with his mother to Silver City, NM. At a young age he was jailed for a minor offense and escaped. In Bonito, Az, he killed Frank Cahilll.
Billy arrived in Lincoln, NM during a time when the Murphy-Dolan Faction and John Tunstall were trying to secure beef contracts with the military in Fort Stanton. Tunstall had befriended Billy and a number of young drifters. The conflict between the Murphy-Dolan Faction and Tunstall turned ugly. John Tunstall was killed. Angered by the death of their friend, the drifters formed a group known as the 'Regulators'. As a self-impose police force, they tried to round up the people responsible for the death of Tunstall.. Many people died during this pursuit..
The plot becomes more complicated and Billy is a wanted man. Pat Garrett becomes sheriff of Lincoln county and begins his pursuit of Billy. The cat and mouse game between these two lasts about a year and a half. Billy is cornered, but escapes. Billy is caught and sentenced to die, but escapes. Finally, Pat Garrett waits for Billy in a room at Pete Maxwell's home in Fort Sumner, NM. Billy enters and Pat Garrett fires.
Billy the Kid is buried in the old Fort Sumner Post Cemetery near present day Fort Sumner, New Mexico. There are plenty of signs directing you to the grave.