The man with the iron badge
(Book)

"He doesn't look old enough to drink, let alone wear a badge. But twenty-year-old Sheriff Dan Starkweather has a lifetime of hatred for his outlaw father--and he sure can shoot. Clint Adams is impressed--and agrees to help track the senior Starkweather's gang. When Nate Starkweather shoots a sheriff, he aims for the tin badge--which is why the kid had his made of iron. So all Clint and Dan have to do is follow the shot-through badges. But when the trail ends, even Clint finds the odds may be more then [sic] they can handle..."--p.[4] of cover.