We'll never know for sure...

Found in the walk-in freezer at work today: One (1) loaf of zucchini bread, the plastic wrap ripped open and one corner broken off.

Possible causes, from most likely to least:

1) Someone knocked the zucchini bread off the shelf and put it back without noticing/caring that it was no longer safe to eat
2) The storeroom clerks are not being fed enough and wanted a snack
3) Ice mice

I had to throw it out, since we couldn't serve it anymore, but the mystery lingers.