Actually only one case - but ... well mutliple victims and a lot of things that were mentioned and implied. A documentary (that was split into 4 parts all around an hour) that is quite tough to watch to say the least. I imagine people in Belgium are aware of this - on the other hand, I saw Gladbeck, which happened in Germany and I had no idea how insane it was - what happened back then (80s).
And you can apply that to the happenings here too. If you have some decency and if you are empathatic - I don't know how you will be able to stomach what is being served here. I personally think it is a bit too long, but you could also say that it is just thorough - getting to every aspect and every individual who was involved in the case. And covering all the aspects of it - also how it was perceived and covered in the publics eye back then.