If I could give it 0 stars I would. I don't know what was scarier the horrific and brutal nature of the crimes or the incompetency of the Delhi police. The zero stars is not for these things though because obviously you can't control the story you can only present it to us. But:
1. The facts were presented so sloppily and in some parts, you didn't even know how they got from one point to the next
2. The documentary was not in the least respectful to the family and friends of both the victims and murderer. One of the people they interviewed from the village even expressed fear of what would happen if the killer was released and they chose to still include that footage despite knowing that the killer is out on parole. So essentially this documentary managed to in a weird, twisted way glorify the killer by giving his story such a huge platform, without an afterthought to the victims affected by his crimes.