Bill Downing a.k.a. William F. Downing was a notorious outlaw during the Wild West era in Arizona. Downing had fled from the Texas Rangers posse who was after him when he came to Arizona. In Arizona, he was involved in the killing of William S. “Slim” Traynor and in various train robberies including the robbery of the Train Depot in the town of Cochise. Downing was so unpopular that even members of his gang couldn't stand him.

Pearce, Arizona, and Sunsites, Arizona, are adjacent unincorporated communities in the Sulphur Springs Valley of Cochise County, Arizona, United States. The two communities are often referred to as Pearce–Sunsites, Pearce/Sunsites, or Pearce Sunsites.