The 3D remake of the My Bloody Valentine, released in 2009.Much like in the original film, the film is centered around murders committed around Valentine's Day, perpetuated by a psychopath in a miner's outfit.
This remake provides examples of the following tropes:
Jerk with a Heart of Gold: Axel. He cheats on his wife with his employee, but he also genuinely cares about the wellbeing of her and their child, even telling his wife to shoot and kill him just to ensure that she survives unharmed.
Karma Houdini: Tom receives this from the law over his role in the mining accident. While Tom claims that it was an accident on his part that caused the explosion/cave-in, he is absolved once the rescue teams get to the miners and discovered that Harry sadistically killed his friends in order to ensure his own survival via hogging all of the oxygen for himself.
Tom actually gets this twice; after he's revealed as the killer, he is presumably killed by Sarah and Axel in the mines, but survives and escapes.
Kick the Dog: Frank secretly videotaped himself and Irene, calls her a whore, flips her off, then says he's gotten tired of her. He also has a wedding ring on, so we can add adultery to the list.
Kill Us Both: Suggested by Axel when Sarah has him and Tom at gunpoint.