Both are reviewed in the April issue of the FLETC Informer.
US v Carless: 10th Circuit upheld a knock and talk contact at a house with a "no trespassing" sign on the front porch. The knock and talk led to a voluntary entry to the home where drugs were in plain view, which led to a search warrant for the home.
Article from Lexipol on this case.
US v. Mendoza: The court upheld a consent search of a vehicle after a traffic stop and a warning for the violation. The court ruled the stop was not extended and the discovery of drugs in the walls of coolers in the vehicle were legal.