Broccoli Thief

We had broccoli growing in our garden over the winter. It survived getting snowed on multiple times, including last Tuesday. We looked at it Sunday, and it was making progress, in a slow, vegetable kind of way. And then....cue creepy music....it disappeared. Somewhere between Sunday afternoon and Monday evening, something got at it and apparently ate it all the way down to the root. A raccoons? Birds? Sea monsters from the river?