Live Free or Die (2006)

It's not the crime, it's the cover-up. In small-town, hard-scrabble New Hampshire, foul-mouthed all-talk slacker John "Rugged" Rudgate fancies himself a criminal. When a local plumber stares him down at a pub, Rugged vows revenge, pouring brake fluid in the man's water supply. When the man dies from unrelated causes, Rugged and his side-kick, the even dimmer Jeff, try to cover up what they think is murder. One bad decision begets another.