Tom Horn see as a warning. During the Wilcox train robbery investigation, Horn obtained information from Bill Speck that revealed which of the robbers had killed Sheriff Josiah Hazen during their escape. Either George Curry or Harvey "Kid Curry" Logan were said to have killed the sheriff. Both outlaws were members of Butch Cassidy's Wild Bunch gang, then known as "The Hole-in-the-Wall Gang" after their hideaway in the mountains. Horn passed this information on to Charlie Siringo, who was working the case for the Pinkertons. Horn briefly entered the United States Army to serve during the Spanish–American War as the chief packer
Butch Cassidy Railroad chairman E. H. Harriman attempted to meet with Cassidy through his old ally Matt Warner. On August 29, 1900, Cassidy, Longabaugh and others robbed Union Pacific train No. 3 near Tipton, Wyoming, violating Cassidy's earlier promise to the Governor of Wyoming and ending any chance for amnesty. On February 28, 1900, lawmen attempted to arrest Kid Curry's brother, Lonny, at his aunt's home. Lonny was killed in the shootout that followed, and his cousin Bob Lee was arrested for rustling and sent to prison in Wyoming. On March 28, Kid Curry and News Carver were pursued by a posse