Kurt & Courtney (1998)

http://www.imdb.com/title/tt0138563/



Note: This documentary contains a test that claims to prove that Kurt Cobain could have injected himself with 3 times the lethal limit of heroin and then shoot himself. The test is invalid and the documentary creator, Nick Broomfield, publicly acknowledged the test was invalid but added  that it was too late to remove it from the film. The reason for the test being invalid are that the drug used in the test was a methadone and not heroin, and the methodone was administered orally and not intravenously.