U.S. Court of Appeals for the Sixth Circuit
Aaron Davis v. Tyler Duncan
August 13, 2026
Summary
The court affirmed summary judgment for the institutional defendants and Dale Osborn on Davis's failure-to-train, custom-of-acquiescence, negligent-hiring, and supervisory-liability claims. It held that Davis failed to identify evidence creating a genuine dispute concerning deliberate indifference, causation, a persistent pattern of unconstitutional conduct, a strong connection between Duncan's background and the assault, or Osborn's knowing authorization or acquiescence. The court also upheld the district court's Rule 54(b) certification and exercised appellate jurisdiction. Judge Bush, dissenting, would have dismissed the appeal because Duncan's forthcoming trial could moot the issues presented.