The Night Buffalo (2007)

Unable to cope with the fact that his girlfriend Tania cheated on him with Manuel, his best friend, Gregorio, a twenty-two year old schizophrenic sets an elaborate revenge plan into motion before taking his own life. He has been in and out of mental hospitals for years. During his time away, his girlfriend and Manuel began an illicit affair. Before long they have fallen in love. Though Gregario and Manuel seem to reconcile after he is discharged from the hospital, everything changes with Gregario commits suicide. Upon his death, Manuel inherits a box of notes, lyrics, and other curiosities from his old friend. Later, he begins receiving unsigned letters quoting Gregario's writings and starts hearing excerpts from the letters in conversation and in the media, leading the unscrupulous friend to fear for his own sanity.