They claim they traced it by DNA from scat through several states Michigan being one, that it had passed through. Around the same time frozen tracks were found, photographed, and identified at the Quabbin reservoir in central Mass. It had to have crossed many roads and trails but no others were found. For years there was a hotline to a MassWildlife office that had a list of houndsmen who would put dogs on a fresh track,or at a sighting but none ever found. I think that program has ended, but other states should take that up, could settle some sightings. Always an interesting topic.