And two retired New York City police detectives have been arrested for taking part in eight murders of behalf of the Mafia. Prosecutors say that while the two men were working as NYPD detectives, the men were also on the Mafia payroll and routinely funneled secret information about criminal investigations to other members of organized crime. Louis Eppolito and Stephen Caracappa were arrested Thursday in Las Vegas. In one case, in 19 90, prosecutors said the detectives, driving an unmarked police car, pulled over a Mafia captain in Brooklyn and shot him to death for a rival mob figure. In another, in 1986, they flashed their badges and kidnapped a mobster, threw him in the trunk of their car and delivered him to a rival, who tortured and killed him.