Who could have perpetuated such a hideous crime? Well, the Hamburglar has a criminal record, but this isn’t his M.O. It couldn’t be Grimace because he’s too stupid to have pulled this off without leaving evidence.
However, we do know this: the fries had video tape of the dirty dealings of Mayor McCheese, so he had motive. Maybe he hired the Fry Kids Gang to do his dirty work. Needless to say, they wouldn’t need much convincing.