GULFPORT, Miss. — D’Wayne Swear, a law enforcement officer who worked in Louisiana and Mississippi and served as an advisor on the television series “NCIS: New Orleans” has died at age 60.

Bradford-O’Keefe Funeral Home said Swear died Tuesday at his home in Gulfport. His longtime friend Glenn Grannan of the Hancock County Sheriff’s Office said Swear had recently been diagnosed with cancer.

Swear was a deputy with the Jefferson Parish Sheriff’s Office in suburban New Orleans before working as an agent with the Naval Criminal Investigative Service. He retired from NCIS in 2010 and settled in Gulfport. He later worked for the Hancock Sheriff’s Office. In 2014, he became an on-set technical advisor for “NCIS: New Orleans.”

Visitations and funeral Masses are set for Saturday in New Orleans and Monday in Gulfport.

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