In Sanchez v. Guzman, the U.S. Court of Appeals for the Tenth Circuit affirmed the district court’s decision to grant qualified immunity in a Section 1983 excessive-force claim. In doing so, the court emphasized that litigants can waive a winning argument if they fail to properly prosecute their appeal. In Sanchez v. Guzman, No. 22-1322, 2024 U.S. App. LEXIS 15756 (10th Cir.