Academy Award-winning actor and producer Leonardo DiCaprio has teamed up with filmmaker Shannon Kring on the upcoming documentary `Nine Little Indians,` which sheds light on the harrowing story of abuse at a US boarding school for Native American children.

The documentary, currently in post-production, follows the nearly two-decade-long legal battle of the Charbonneau sisters and their childhood schoolmates who endured horrific abuse at St. Paul`s Indian Mission School in South Dakota.