Nest Of Vipers (1969)

aka's: La Notte Dei Serpenti/Gringo Uccidi E… Le Notte Dei Serpenti/
Night Of The Serpent

A corrupt Mexican cop (Luigi Pistilli) tries to steal an inheritance from a young boy by hiring Luke (Luke Askew) to become his assassin and patsy. When Luke becomes aware of the plot, he switches sides and a bloodbath ensues. Also with Magda Konopka and Chelo Alonso.