William “Colorado Bill” Wiley was a Union Army veteran who moved west after the Civil War, ultimately settling in Muskogee, Indian Territory.
In February 1879, David Brown and Ross Cunningham went to the brothel where Wiley lived. When the two men overstayed their welcome, Wiley urged them to leave. When Brown reached for a gun, Wiley shot and killed him and wounded Cunningham.
At trial, Wiley was convicted and sentenced to death. He was hanged at Fort Smith on September 5, 1879.
The Federal Death Penalty Project 