สามพราน (1960)

Two brothers from a policeman's family are living their contrasted morals: Thep, the elder one, drinks his life away while Pongthai, his younger brother, is trying hard to be a good cop. One night, their dad was gunned down by opium gangsters, the very night Thep had a fight with him and fled the house with anger. Pongthai and others now believe his delinquent brother is a killer.