Large police presence along U.S. Highway 20 near Rigby Saturday night. | Courtesy Trent Petersen RIGBY – A routine traffic stop near Rigby Saturday night turned into an arrest for a man with outstanding warrants. Lt. Marvin Crain with Idaho State Police tells EastIdahoNews.com around 6:15 p.m., a man was spotted in the westbound lane of U.S. Highway 20 driving 80 mph in a 70 mph zone. Map of U.S. Highway 20 | Wikipedia Commons When EastIdahoNews…