Exactly. After the facts of the Jaycee Lee Dugard case came out, I remember wondering "how many more of these situations are going on right now."
There was also the older Marc Dutroux case in Belgium.
There was that story a few years ago about a man in Austria who had a woman imprisoned in a basement “apartment” and had children with her. Then the one in Antioch California a year or so ago. There seems to be no shortage of nutcases out there.