 Horn worked on a ranch owned by Robert Bowen, where he became one of the prime suspects in the disappearance of Mart Blevins in 1887.Horn also participated with Glenn Reynolds in the lynching of three suspected rustlers of the Graham faction, Scott, Stott and Wilson, in August 1888.Over the next few years after 1887, several lynchings and unsolved murders of members of both factions took place, often committed by masked men.