I think I figga'd out what you witnessed out at Otis:
1. The remains of deer that stumbled upon Jim H's Otis Time Trial course. I think what may have happened it that the deer inadvertintly brushed aside a blown down branch (we all know it's illegal to move a blown down branch on Mass Wildlife land), Jim H. (still angry because nobody wanted to help him build a time trial course on Otis), then beat the deer to death with said branch.
2. The dude with the mullet was probably Slappy. He has a long history of sporting a mullet along with Iron Maiden t-shirts......damn Bruce Dickenson wannabe.
3. The assless chaps guy was probably David J.........this was well before he didn't mind scrapping his bike on rocks and was concerned with protecting his thighs.