"The people of Harris County have a right to be safe when they're driving around," said Harris County Assistant DA Doug Richards. "We've come to a point right now where I am going to go to court with a sample one way or another with or without somebody's consent."
Officials set it up several times a year. This weekend was chosen because of Saint Patrick's Day, spring break, and the Rodeo.
The DA's office says it has a 100 percent conviction rate during these no refusal weekends.
