Who Shot Tom Horn ? #Mescalaz #stevemcqueen #tomhorn # #mostfamouschallenge #fblifestyle. Tom Horn (1980 Film) This film, one of Steve McQueen's last roles, is based on Tom Horn's own writings and offers a somber character study of a man out of time, struggling to adapt to a changing world where the "Wild West" is fading. Plot: Tom Horn, a legendary army scout and tracker who helped capture Geronimo, accepts a job as a "stock detective" from a powerful cattlemen's association in Wyoming to deal