The instrument he’d bought to protect his son became the instrument that convicted him of failing him.

And he almost got away with it — he was clever enough to remember the camera and delete what he thought was the record, which is more than most panicking people manage.

But he made the mistake that clever people who aren’t quite as clever as they think always make: he understood the system just well enough to be dangerous and not well enough to be safe.

He knew the camera saved footage.