The term 'Narc Follower' is a job title for someone who follows up on cases involving narcotics. The two crossword solutions for this term are OTIC and OSIS, both of which are four letters long. OTIC stands for 'Office of Tactical Intelligence and Counterintelligence, ' which is a branch of the Drug Enforcement Administration (DEA) that focuses on intelligence gathering and counterintelligence operations related to drug trafficking. OSIS stands for 'Office of Special Investigations and Surveillance, ' which is a branch of the DEA that focuses on conducting investigations and surveillance operations related to drug trafficking.