When you play your trump card, and things don't turn out the way you planned, there's nothing else to do but to try and save face.
So in the matter of the mystery of the Stolen Bonbons I find that there is insufficient evidence to try and convict anybody. The perp has not come foreward and fessed up. Therefore he or she still walks among us, and shall remain doing so.
It's a real bummer.
I declare an Unsolved Mystery
In light of this I have no choice but to declare an Unsolved Mystery.
I have spoken.