OH left half a (quite large) pork pie on the floor in the living room overnight last night by accident. He had brought it home from work and, on unpacking his bag, put his coat on top of the parcel and forgot about the slice of pie.
This morning we came down and the sandwich bag it had been in had been pulled out, ripped open, and only the pastry of the pie was left.
Our first instinct was that it must have been a mouse, but we've never had food stolen before and there was no mouse poo... could a mouse even eat that much pork pie? I think I'd struggle to eat that much.
On closer inspection there was black and white fur stuck to the greasy bag, not the brown fur of a house mouse.
We live semi-rurally and have a cat flap (locking mechanism is broken) so some beastie might have well come in. Do badgers fit through cat flaps? I've never once seen a black and white cat locally. 
AIBU to let my curiosity get the better of me and want to leave a pork pie out tonight and set up a camera to catch the pie thief? I want to know who ate all the pie!