Without a trace

Their best conclusion is that Gareth Williams managed to padlock himself inside a duffle bag that was placed in a bathtub, without leaving a single handprint on the bathtub, or any traces of DNA on padlock, both of which have been described elsewhere as wiped clean. Wow. I thought David Copperfield had mad skills.

Perfect crime and MI6 agent not killed.

I'd never get away with this in a book.