@tsarstepan,
I have been through a podcast series about serial killers. Also listen at times to Unsolved Murders podcast
Morbid curiosity? Weird interests? Oddly fascinated with serial killers?
All of the above? Yeah, that's about it. However certain ones sicken me and I won't watch or listen to anything on them.
Not really hooked on them, as I can go weeks and months not listening to any.