Instead, you get a movie that's enjoyable enough, but leaves you feeling like it could have been much, much more.

Fanciful, disturbing, and wildly original, it announces the arrival of a fresh, bold voice in American cinema.

At first rather annoying in its heavy emphasis on reenactments, this movie ultimately proves fascinating, simply because the complicated, highly dramatic tale it tells still almost defies belief.

This is a must-see and one of the best documentaries - and films - of this year.