_**Val Kilmer and Sam Shepard investigate a murder on a South Dakota Reservation**_ A young, half-Sioux FBI agent (Val Kilmer) teams-up with a veteran agent (Sam Shepard) to investigate a murder on a Reservation in western South Dakota where the pro-government faction conflicts with ARM, the Aboriginal Rights Movement radicals. Graham Greene plays a tribal police officer. “Thunderheart” (1992) is a Western that takes place in the modern day loosely based on events relating to the Wounded Knee incident in 1973. ARM from this movie is an expy of AIM, the American Indian Movement, which ...