SPOILERS HERE:
There's a miniseries on Netflix that I watched strictly because Merritt Wever is in it and she's one of my favorite actresses.
It is about a real life hunt for a serial rapist. It's a real case and somewhat famous because the first victim was pressured into recanting her story and saying that the "stranger rape" in her apartment during the night didn't really happen. She was prosecuted for making a false claim. Evidence found later included pictures of her rape with her learner's permit photographed on her naked back during the sexual assault.
All this happened in the last 12 years or so.
There was also a book written about this. The miniseries is based on the book but without the viewpoint of the rapist himself (which was included in the book after the authors and others had spoken to him in prison). I read the book.
People like Ted Bundy and others who rape and/or kill people (women, usually) have this drive to harm people that can truly be called "pure evil".
Sometimes rapists stalk their victims for some time (and even go into their homes quietly while their victims are sleeping without the victims ever knowing that they were there). The victims might notice that they've lost small things that the stalker has taken.
The Manson family used to go into people's houses for "creepy crawly" events where they moved things around without taking anything. They wanted the people in the houses to doubt their memories or to be creeped out in general.
One of the homes that the Mansons snuck into for creepy crawly to move things around was the LaBianca home.
It's an evil that comes from within - a lot of people call it being a sociopath.
They have no empathy for other people - only themselves.
It's pretty shocking that such people exist.