Peter," said Tyburn. "I need you to stop just pretending to be clever and actually be clever. - Ben Aaronovitch

You don’t get to be a senior investigating officer unless you have a degree in skepticism, an MA in distrust and your CV lists suspicious bastard under your hobbies.

I want assurances," said Zach.
"You can have my word," I said.
"No disrespect, Peter," he said, "but I don't want a promise from the monkey, I want it from the organ grinder.

None of those choices seemed likely, but if I’ve learned one thing on the job, it is that a coincidence can kill someone just as easily as malice.