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Naval Criminal Investigative Service
Naval Criminal Investigative Service
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NCIS History
From the Real NCIS to the Small Screen
December 8, 2025
— Leon Carroll, Jr. turns his experience as a Special Agent into a career as technical advisor for the popular ‘NCIS’ television franchise Before Leon Carroll, Jr. offered his expertise as technical advisor for CBS’ NCIS television franchise, he spent 21 years as a real Special Agent for the Naval Criminal Investigative Service.Leon began honing the...