What's the worst that can happen if you get arrested for DUI and talk to the police without an attorney?
"In August 1971 an ordinary London policeman arrested a man who was driving drunkenly down Tottenham Court Road. He turned out to be Oleg Lyalin who was a KGB agent. [...] Lyalin panicked and offered to tell MI5 the names of all the Russian spies in Britain. [...] the Home Secretary expelled 105 other members of the trade delegation, because Lyalin said they were spies."