'' Mad Detective '' ( Chinese : 神探 ) is a 2007 Hong Kong psychological thriller film produced and directed by Johnnie To and Wai Ka-Fai . '' Mad Detective '' was first screened at the 64th Venice International Film Festival , and later premiered at the 2007 Toronto International Film Festival , before being released in Hong Kong on 29 November 2007 . The film 's screenplay won " Best Screenplay " awards at various Asian film ceremonies
64th Venice International Film Festival
64th Venice International Film Festival
Mad Detective