Bigfoot doesn't drink alcohol, why would the "Authorities" check to see if alcohol was involved? And just what makes them an "Authority" on Sasquatch?
What really happened in that story is the drunk Montanans were stealing berries and the Elder 'Squatch propelled the thief into the road as a lesson for the younger 'Squatches.
Moral of the story? You better not shout, you better not doubt, you better not try, I'm telling you why, Santa 'Squatch is coming to town.