By Carson Walker
Sioux Falls, South Dakota (AP)

For the first time, federal prosecutors handling a 1975 slaying on the Pine Ridge Indian Reservation have directly accused one of the defendants of supplying the gun that killed Annie Mae Aquash.

Richard Marshall and John Graham pleaded not guilty Oct. 10 in Rapid City to a new indictment charging them with committing or aiding and abetting the first-degree murder of Aquash when all three were active with the American Indian Movement.