Serial Killer 'Case'
You're tagline is strange in the context: "The Truth Behind Sweden's Most Notorious Serial Killer".
...which is that the Supreme Court of Sweden has interpreted article 6 of the "European Convention on Human Rights" as stating that the "defendant shall be considered innocent after an acquittal".
Maybe a better wording would be to add "...most notorious serial killer" case (even if you don't get the instant "attention-hook" or what you call it)?