Former President Joe Biden commuted the life sentence of Indigenous activist Leonard Peltier, who had been imprisoned for nearly 50 years, on Jan. 20.

American Indian activist Leonard Peltier speaks during a 1999 interview at the U.S. Penitentiary at Leavenworth, Kan. President Joe Biden commuted to home confinement Peltier's life sentence after he spent most of his life in prison for the killing of two FBI agents in South Dakota in 1975.

The Native American activist says he did not receive a fair trial in the slayings of FBI agents Ronald Williams and Jack Coler at Pine Ridge Indian Reservation.

It's the sort of twist no screenwriter would dare invent: "Free Leonard Peltier," a persuasively well-researched and often infuriating documentary about the American Indian Movement activist convicted nearly a half-century ago of killing two FBI agents,

Sundance: Jesse Short Bull and David France's documentary about the American Indian Movement member who was imprisoned since 1976 for killing two FBI agents is a disappointment.

Jesse Short Bull and David France's documentary tells Peltier's story all the way through President Joe Biden's commutation.