 He greatly admired Horn's talents and skills in tracking down suspects, but reflected later that Horn had a dark side that could easily be accessed when need be.In Feb. 1891, assuming the name of Charles T. Leon, Siringo undertook a 6-month investigation for New Mexico Governor L. Bradford Prince.Siringo was tasked with investigating the attempted assassination of Elias S. Stover, Thomas B. Catron, T.B.