Why do you think the public is so fascinated by serial killers despite the fact that there are relatively few of them and they commit a very small portion of annual murders? Is it because they...

Why do you think the public is so fascinated by serial killers despite the fact that there are relatively few of them and they commit a very small portion of annual murders? Is it because they represent the dark side of humanity? Or because they represent sex and violence to the extreme, something that has always fascinated the public?