Detroit (MI) Country Day linebacker Kolin Demens, the brother of Kenny, decommitted from UCLA today. I can't imagine there's any pre-existing bad blood with Chip Kelly since Kelly hasn't been coaching in college for several years, but Demens just committed to the Bruins in late October and is already backing out.
I don't think Michigan will get involved again, even though they offered early. It didn't seem like Michigan was trying hard to land him.
EDIT: Demens is a 3-star, the #25 inside linebacker, and #603 overall in the 247 Composite.