Being from the US, we have a lot of exposure to serial killers, but we very rarely hear about other countries' serial killers. This was a very well thought-out and put together documentary about a very sick man. Hearing from the actual police officers, detectives, forensic scientists, and profilers that originally handled the case was quite fascinating. I thought that the actor reenactments of some of the crimes spliced with real footage and interviews was very well done. Some of the actual footage was incredibly creepy and made my spine crawl. Netflix did a superb job, and it's very hard to stop watching once you start.