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Actor Mark Harmon standing in a garbage dumpster with former-NCIS Special Agent Leon Carroll standing next to him outside the dumpster.

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Retired Special Agents Leon Carroll and Roy Mosteller sit together at a table

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Retired Special Agent Leon Carroll on the left, singer and talk show host Kelly Clarkson in the middle, and actor Mark Harmon on the right stand together on the set of the Kelly Clarkson show.

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Black and white photo of retired Special Agent Leon Carroll taken when he served in the U.S. Marine Corps.

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Retired NCIS Special Agent Leon Carroll stands in his office amongst memorabilia collected during his time with the agency.

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Retired NCIS Special Agent Leon Carroll sits at a table in his home and shows off the two books with co-wrote with actor Mark Harmon.

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Leon Carroll, Jr. poses with a photo of him when he was a Marine and an NCIS baseball cap at his home in Long Beach, California.

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Actor Mark Harmon, left, and Leon Carroll, Jr. interact on the set of CBS' "NCIS" television series. Carroll was the shows technical advisor.

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NCIS Special Agent in the foreground looking at USS Harry S. Truman (CVN-75)

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NCIS Special Agent holding a flashlight while Navy Chief Petty Officer points

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People standing behind a speaker standing at a podium

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Black Labrador dog, named Jelly, posing in front of the American flag.

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Yellow Labrador dog, named Noni, poses in front of the American Flag

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Black lab dog posing in front of an American flag

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Black lab in front of a flag

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black lab posing in front of an American flag

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black lab dog posing in front of an American flag

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Three Black Labradors sitting in front of flags

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Black Labrador dog sniffing a box

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Black Labrador dog sniffs a can

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