2015 movie starring Chris O'Dowd who plays David Walsh, an Irish sports journalist who suspects that Lance Armstrong's phenomenal Tour de France victories are due to the use of banned substances. The film follows the story of his investigation which eventually exposed Armstrong. The film is based on David Walsh's 2012 book 'Seven Deadly Sins' and is directed by Stephen Frears. Also stars Ben Foster as Lance Armstrong, Dustin Hoffman and Laura Donnelly.