There was a wild born white buffalo about 30 years ago up in new Mexico area I think. They are indeed sacred to most Indian tribes. Because of that I doubt an Indian did it. But, I've also been on reservation land a lot, know how a lot of Indians are the last 30 years, and have seen how they live their lives. Almost makes me ashamed to claim my Indian blood.
Reperations to tribes have made a lot of tribes lazy. Kind of like what we see today with handouts.
But back to the buffalo Id bet it was some trailer trash( pick your color) just looking for the buck and not even caring about the significance to the tribes of a white buffalo