Kamurai
Good watch, could watch again, and can recommend. (At least for Halloween comedies.)
This is definitely a Adam Sandler/Happy Madison Halloween story, through and through. Lots of dirt humor throughout, and way too many pee jokes.
While it tries to put a wholesome "life lesson" twist on it, but as the whole movie is satirical, it doesn't come off sincere at all. Almost like it's promoting abuse as funny.
The humor is questionable at points, but the majority of the movie is really enjoyable with a pretty well written script and some really great moments throughout the movie.
As it moves into a mystery movie it relies less on the investigation and traditional "drip feeding" of information on discovery and more of a battle agains...