Sometimes, I shudder at the monstrosities that man can do. As they say, fact is often stranger than fiction.
Josef Fritzl locked up his own daughter in his carefully designed soundproof prison in his cellar. He systematically raped her and fathered 7 children with her, keeping her his prisoner for 24 years.
In this case, it is even more horrifying than fiction. The novel Flowers in the Attic depicts a similar scenario.
I just cannot believe that something like this has happened in real life.