"We were NUMB" I read a review prior to watching it that had in its second paragraph a recommendation to skip any spoilers or even general reviews, and I second that. So please watch it first then comeback here to read the discussion.
Took me long enough to watch this documentary, but I finally did, and if I had to summarized in one word it would be "Numb". This is how I felt during the last act of this movie.
I always had a hard time watching documentaries but this one did a great thing to hook me up, which was on its editing. The pace seems rushed but it helps you not get bored, because as it is a crime history, it has a lot of court scenes and difficult expressions, but the director did a great job mixing those scenes with interviews about who Andrew was, and the fun moments the grandparents had with the baby.
But the great virtue is in its final 30 minutes, where we are given a terrible twist. When Kurt starts to talk about how the baby and the mother were missing, and the interviewees were all talking about how they were prepared to receive the bad news, I too was prepared to the worst scenario, but the way the director delivers it crushed me. The moments before the deliver were we are given a black screen with no sound whatsoever that seems to show us that it is the last moment of calm we will have until the final moments of the documentary. Then we are flooded with one of the best montages I've ever seem, with repetitions, paraphrasing, cursing and a pace so fast that I could only try to capture everything I was witnessing.
I froze for about 15-20 min with my whole body tingling and a sea of tears, where I could not control but also didn't look like a proper cry because I wasn't sobbing, just my eyes were a portal to a waterfall.
In conclusion, this will forever mark me as one of the strongest hits I've ever had watching a film.