In criminal law, this is the doctrine that states that a defendant may be entitled to a new trial if (1) new evidence is discovered that would tend to show that a government witness gave false testimony, (2) that the jury might have reached a different conclusion had this information been presented at trial or had the government witness' false information not been shared, and (3) that the information unfairly surprised the defendant at trial. This rule was created in Larrison v. United States, 24 F.2d 82 (7th Cir. 1928).