Mark Langan retired after a twenty-six-year career with the Omaha Police Department. In 1978 Mark was the youngest police officer ever hired on the Omaha Police Department at age eighteen. He worked as a uniformed officer and as a detective in the Burglary, Vice, and Narcotics Units. Mark was promoted to the rank of sergeant in 1988, working as a supervisor in the Narcotics Unit until his retirement in 2004. During his career Mark wrote nationally published articles on various law enforcement topics and lectured throughout the country. Recognized as a court-authorized expert on narcotics