A 4.5 hours HBO investigation/court documentary split into 6 episodes (or chapters).
This is a fascinating documentary by Andrew Jarecki, who also directed "Capturing the Friedmans (2003)" - one of the best court documentaries I've ever seen. It also tells the real life story of the man on which the movie "All Good Things (2010)", also directed by Jarecki, is loosely based.
Like in two other amazing investigation/court documentaries - those about serial killer Aileen Wuornos and the West Memphis Three - this is another example where the filmmaker finds himself getting involved in the story and having a direct and major affect on the case.
If you haven't heard about this in the news, you might want to avoid reading about the case before watching the documentary - although I did read about it (and then recalled the news several months ago) and it didn't spoil the fascination of watching it.
The documentary follows the life of Robert Durst, who is the son of the late Seymour Durst, one of New York's richest real estate investors and developers. For years Robert has been suspected of killing 3 people: His wife, his female friend, and his neighbor. However, he always managed to "walk between the drops without getting wet".
The film has tons of material, showing old footage, evidence, interviews with the people, reenactment of events, actual footage from court,and amazing of all - interviews and full cooperation from Robert Durst himself.
Each episode focuses mainly on one thing. Starting from episode 4 you'll be glued to your chair. Episode 5 is where the filmmakers themselves are getting into their own documentary and becoming a part of it. I don't want to "spoil" anything for you, but episode 6 is simply amazing. You can't invent stuff like that. The very last minute is simply something that is taken from the movies.