John and Tom Power in 1960. The Powers brothers were serving a life sentence in Arizona State Prison for the murders of three sheriff’s deputies in 1918. Arizona Daily Star

John and Tom Power lived with their father John in a cabin in the Galiuro Mountains, near Klondyke. The brothers were accused of draft evasion and were ordered arrested. A posse rode horses to the cabin early on Feb. 10, 1918. A shootout ensued, resulting in the deaths of the Graham County Sheriff and two deputies, as well as the elder John Power. Go to tucson.com/retrotucson to see photos of the Power brothers in prison.