Ola,
My family has an oral history of my grandfather's grandfather and his wife being killed on the Red River by "whites". My Grandfather was part Cherokee. His name was Oley Smith. My grandfathers grandfather was Jackson Smith and his wife's name was Sarah. If the story is true they would have had to been killed after 1870 when their last child was born. Have you found any other information about what you have been looking for?
Dorothy