My guess is a cat or something got ahold of what was left after someone cut the head off and had it for dinner.
SO, you also believe that a Federal crime has been committed?
Honestly, I do not understand why Canada geese are protected. Maybe keep them safe from being hunted on a widespread basis as they were in the '40s, '50s and '60s, resulting in declining numbers, but the numbers of these game birds have recovered.
We should be allowed to (OK, we will need to buy a license and register each one we take, just like most big game. Fine!) eat them, without endangering our future.