My son asked his friend who had nothing to drink to drive his car. He was pulled over for a headlight that was out. The officer first gave the driver a breathalyzer, he blew a 0 and my son then blew after him and was over. Is the officer allowed to test a pasenger in the car after he tests the driver and blows a 0? It was my sons car and he did tell the officer he had a few drinks.