When Detective Walsh is going over the files of Cole and Lutz with Detective Schraeger, it briefly showed "Tulsa, AZ" as a location of one of their crimes. It in fact should have read "Tulsa, OK."
Casey referred to a police car as a "black and white". "Black and White" generally is a California term, as most police cars, especially in the LA area are painted black and white. New York PD cars are white, with blue graphics, and are generally referred to as "Squad" or "Radio car" or "RMP (Radio mobile patrol)".