They Killed Sister Dorothy is a 2008 American documentary film directed by Daniel Junge about Dorothy Stang, an American-born Brazilian nun who was murdered on February 12, 2005, in Anapu, a city located in the Amazon Rainforest.

The film examines the motives for the murder of Dayton, Ohio native Dorothy Mae Stang, a 73-year-old nun of the Sisters of Notre Dame de Namur order who fought for the preservation of the Amazon Rainforest in the Brazilian state of Pará.

It was also screened at the 32nd São Paulo International Film Festival.

The film and its song "Forever", written and performed by Bebel Gilberto, daughter of Bossa Nova pioneer João Gilberto, were pre-selected for the Academy Awards for Best Documentary Feature and Best Original Song, respectively.

This article about a documentary film on environmental issues is a stub.