Shaggy dog story

I finally found it, although it was so carefully camouflaged this time I missed it first time round.  It was hidden pretty close to where he hid the flip flop.

 I confronted him and this was his reaction ... is this what is referred to as a hangdog expression?

And then he looked at me like this!!

If ever there was a face that was up to no good, that one must be it lol!