On April 11 , 1912 the mining camp 's general store owner Julius Andrews established the post office . Andrews named the post office " Ruby " after his wife Lille B. Ruby Andrews , and the mining camp soon became known as Ruby . The post office was discontinued on May 31 , 1941 . It is rumored to have been the first US Post Office . Between 1920 and 1922 , the town of Ruby , or the desert nearby , was the scene of three gruesome double homicides committed by Mexican rebels or bandits . Together these incidents are known as the Ruby Murders , which led to the largest manhunt in the history of the Southwest
Ruby Murders
Ruby Murders
Ruby, Arizona