I assumed it was going to be some slick evil mastermind unknowingly drugging his nanny.
He was literally just coming home when she just dozed off, and covering her face with chloroform rag…but she was waking up remembering a rag smelling of chemicals and passing out.
After the third or fourth time it happened, she put a hidden camera up.
Sure enough, this sadistic dumb fuck, did it again, but this time in full view of the hidden camera.
He only confessed because she went to the police and showed the idiot knocking her out with chloroform and abusing her, yet again.