COPS' DECOY is a term used to describe a police officer who poses as someone else in order to catch criminals. The job title for this type of police officer is NARC, which stands for Narcotics Officer. A Narcotics Officer is a law enforcement officer who specializes in the investigation and prevention of drug-related crimes. They often use undercover tactics such as posing as a drug dealer or user in order to infiltrate criminal organizations and gather evidence.