ALBUQUERQUE (AP).- His mythical exploits and jail escapes made this son of Irish immigrants one of the nation’s most famous Old West outlaws. Yet fewer know that the man widely known as Billy the Kid was a central figure in a violent, Irish-English land war in New Mexico, and was beloved by Mexican-American ranchers who felt discriminated against by racist white bankers and land thieves. And the Kid’s end came only after he refused to abandon his Mexican-American teen girlfriend. Despite hundreds of stories and books, movies, songs and even poems covering the notorious Billy the Kid, the PBS series American Experience is joining in exploring his life and myth with a new documentary set to air in January.