Red Rattlesnake

A crime / revenge movie loaded with gory torture sequences, including acid in the shower, a pick-axe killing and a lovely scene where a man is tied to a cross and killed with the titular critters. Scenes from this later ended up in the IFD / Godfrey Ho mishmash Majestic Thunderbolt (1985).

Directed by Kim Seon-gyung, Hui Sing-Yue