?From Wikipedia, the free encyclopedia. Guillermo Arriaga Jordán (born 13 March 1958) is a Mexican author, screenwriter, director and producer. Self-defined as “a hunter who works as a writer,” he authored Amores Perros, received a BAFTA Best Screenplay nomination for 21 Grams, and received the 2005 Cannes Best Screenplay Award for The Three Burials of Melquiades Estrada.Description above from the Wikipedia article Guillermo Arriaga Jordán Roger Young (director) licensed under CC-BY-SA, full list of contributors on Wikipedia.