The culprit has to be. . .
Tiny waffles with tiny bitemarks that means. . . THE CULPRIT IS EXTREMELY TINY!
Either you're a small person or your younger siblings killed the left waffle
hope the waffle had a proper burial.
(but i can guess it simply went to a sewage treatment plant in the end)
10/10 for the lols and creativity :)
/Had a good one