As Ed stumbled away from the scene , Bat Masterson responded from across the street , firing on both Wagner and Wagner 's boss .
Ed Masterson was mortally wounded by a cowboy named Jack Wagner , who was unaware that Bat Masterson was in the vicinity .
As Ed stumbled away from the scene , Bat Masterson   responded from across the street , firing on both Jack Wagner and Jack Wagner 's boss .
Ed Masterson was mortally wounded by a cowboy named Jack Wagner , who was unaware that Bat Masterson was in the vicinity .