Long story short - give it a miss. There are plenty of other high-rated stories both investigated and narrated much better.
As a true crime story and an interesting one, this could've definitely been produced better - in fewer or one long episode, less dramatic with an emphasis on the investigative and psychological aspects, doing away with the explicit nudity and sexual scenes (in comparison, little to nothing was shown of the murder victims),include real footage or audio recordings of interviews, courtroom scenes esp of the accused, input of crime reporters/ investigative journalists who covered the case, etc - who knows, they latter may have even asked the more pertinent questions we didn't hear the detectives ask for example - how was the serial killer sourcing GHB to kill his victims? Were there other victims (still unaccounted for given his MOA of unsuspected deaths in sleep) in the timeline between his grandmother's murder and the first known murder in Berlin?
This series will definitely make some judge not just this Netflix show and German investigative methods but also German life, people and society, in their attempts to understand the Nightlife Killer.
It is not normal for an adolescent to be sharing the same bed with an adult, even a close relative - it creates a risk of sexual and psychological abuse, and future mental health issues. So, the fact that this living arrangement was deemed normal by the boy's parents and the members of that particular household speaks volumes about a dysfunctional childhood. The serial killer's first victim was his grandmother - this is a dead giveaway for those seeking motive and understanding of the killer's psychopathic journey, so it is bizarre and puzzling indeed that neither the aunt, the detectives nor even the forensic psychiatrist make this connection; it also does make one question how German society as a whole views and deals with childhood abuse.
True crime documentaries that are well-made can play very important roles by going beyond simply narrating stories, and also offer insight into criminal behaviour by asking the hard and crucial questions, for the ultimate aim of reducing crime rates and mitigating those factors within our families, societies, schools, workplaces, governments, law enforcement and the judiciary that contribute to creating criminals, sociopaths and psychopaths.
Voir plus 
