Clancy O'Doole was a resident of Lusk, Wyoming. He worked for his brother, Charlie as a ferrier. O'Doole joined Joe and Jake Snow as a hunting party in the employ of John Hatcher in 1890. Along with Snow and Joe, O'Doole briefly traveled to prehistoric Wyoming. He helped kill the Torosaurus that had been pulled forward in time. Like Joe and Snow, O'Doole believed the dinosaur to be some sort of diseased buffalo.