In a civil or criminal case, evidence that existed at the time of a motion or trial but that could not have been discovered with reasonable diligence prior to a court ruling upon the motion or the trial's completion. Upon later discovery, a losing party may assert after-discovered evidence, a.k.a. newly discovered evidence, as grounds for a court to reconsider a motion or order a new trial.
See, e.g. Holland v. Jackson, 542 U.S. 649 (2004).