The John Kinney Gang, also known as the Rio Grande Posse, was an outlaw gang of the old West, which operated during the mid-1870s into the mid-1880s. The gang was organized by outlaw John Kinney, in Doña Ana County, New Mexico. From its beginning, the gang primarily committed acts of robbery and cattle rustling. On December 31, 1875 the gang was involved in a gunfight with US Cavalry soldiers in a saloon in Las Cruces, New Mexico. According to different accounts, they killed one or two soldiers and a civilian outright and wounded three soldiers