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 Hazen shooting, and then passed this information to Pinkerton detective Charlie Siringo, who was assigned the task of capturing the outlaws. The gang escaped into the Hole-in-the-Wall. Siringo became friends with Elfie Landusky, who was using the last name Curry after allegedly becoming pregnant by Kid Curry's brother, Lonny. Through her, Siringo intended to locate the gang. On July 11, 1899, Lay and others were involved in a Colorado and Southern Railroad train robbery near Folsom, New Mexico, which Cassidy may have planned and personally directed. A shootout ensued with local law enforcement, during which Lay killed Sheriff Edward Farr