Serial killers,will there always be a morbid fascination certainly from the media but also from ourselves?

Before anyone begins a moral rant I of course realise these guys are sick twisted individuals who were rightly punished for their appaling crimes.What I am saying though is their cold calculated methodical mindset.To actually go about their daily business as if nothing had happened,avoiding detection sometimes for many years.Seems to me they’re not the actions of mindless maniacs.Bundy.Gacy,Dahmer,Desalvo they all live long in the memory not just for their evil murderous acts,they have a certain dark appeal charisma even.There certainly remains an interest in those & others despite many years passing since their noteriety,books ,movies & such like.