Gucky found the movie title and entry on IMDB that I was talking about earlier. It's Catching the Friedmans.
The director started out doing a documentary on proffasional clowns who cater to childrens parties. One of the people in his documentary was one of the Friedman's, and then the father and one of the sons was arrested for commiting ritualistic crimes, this new story feel in his lap and he ran with it. But, from the directors comments, I get the idea the film is more about shifting truths than anything. It looks good.