A federal judge Wednesday sentenced a longtime U.S. Drug Enforcement Administration agent to four years in prison for leaking DEA intelligence to defense lawyers in a $100,000 bribery scheme that prosecutors said jeopardized drug cases and the lives of confidential informants. John Costanzo Jr. was found guilty last year of bribery and honest-services wire fraud, joining a growing list of DEA agents convicted of federal crimes. Another former DEA supervisor, Manny Recio, is scheduled to be sentenced next month in the same case.