A US priest who helped expose abuses by the Brazilian military dictatorship during the 1970s has been killed in Guatemala. The Reverend Lawrence Rosebaugh died Monday in a robbery attack by masked gunmen. He was seventy-four years old. In 1977, Rosebaugh hand-delivered a letter to First Lady Rosalynn Carter detailing his abuse at the hands of Brazilian forces, helping to bring international attention on the Brazilian dictatorship.