NEW ORLEANS—A prolific narcotics agent was sentenced on Thursday to more than 13 years behind bars for stealing money from suspects, falsifying government records, and committing perjury during a federal trial. U.S. District Judge Jane Triche Milazzo said the longtime U.S. Drug Enforcement Administration (DEA) agent, Chad A. Scott, caused “far reaching” damage “to the administration of justice.” The sentencing capped a five-year case that shook the DEA and resulted in convictions of three other members of a New Orleans-based federal drug task force. Prosecutors portrayed Scott as more dangerous than the most hardened heroin dealers he locked up, saying the Louisiana lawman “broke every rule in the book” to enforce his “own approximation of justice.” They had asked Milazzo to sentence Scott to nearly two decades in prison. “He undercut law enforcement and he disgraced the entire judicial process,” federal prosecutor Timothy Duree told the first jury that convicted …