 At the scene of the holdup, Wells, Fargo & Co. undercover agent Fred Dodge discovered an unusual boot print left by someone wearing a custom-repaired boot heel.The Earps checked a shoe repair shop in Bisbee known to provide widened boot heels and were able to link the boot print to Frank Stilwell.When Stilwell arrived in Bisbee with his livery stable partner, Pete Spence, Tombstone Marshal Virgil Earp, Special Police Officer Wyatt Earp, and Cochise County Deputy Sheriff Billy Breakenridge arrested them for the robbery.