The Murders of Frank LeSueur and Gus Gibbons by the WILD BUNCH. Relative Steve LeSueur shares the family story. Life and Death on the Frontier: The Murders of Frank LeSueur and Gus Gibbons by the Wild Bunch. Two young possemen had a deadly run-in with the Wild Bunch. Teenagers Frank Lesueur and Gus Gibbons didn’t stand a chance. They were part of a posse chasing some cow thieves. What none of them knew was the culprits were members of the Wild Bunch—including deadly gunmen like Kid Curry.