Leroy Jethro Moore was an African American World War II veteran, the best friend of Jackson Gibbs, and the partial namesake of NCIS Special Agent Leroy Jethro Gibbs.
Both Leroy Jethro Moore and Jackson Gibbs during their youth fell in love with Ann. Because of hostile views of interracial marriage at the time, Moore let Ann Gibbs marry Jackson, although they still remained in contact with each other. They were later enlisted into the Army (presumably the Air Corps, based on comments by both Jackson and Moore) and participated in World War II. In large part because of his African heritage, he was denied the Congressional Medal of Honor until 1993, being one of only two people to actually receive the honor while still alive. Because of Jackson's friendship with Moore, he named his son after him.
After the war, Moore and Jackson tended a shop together. However, after Ann died, Jackson, believing that Ann let Moore in on her suicide, and did not stop her, broke off their friendship and evicted him from the shop. His anger towards his former friend was strong enough that he refused to even acknowledge that he knew him.
In 2012, Moore, because of his retirement home requiring repairs, ended up being forced to pawn off the Congressional Medal of Honor despite such an action being considered a felony, to gain the funds necessary to fix the place.
Because of this, Leroy Jethro Gibbs, Jackson's son and an NCIS special agent, who discovered the pawning off of the medal while attempting to solve an unrelated murder regarding an ex-Navy Petty Officer/valet guard, attempted to question him regarding both his motives regarding the pawning off of the medal, and why he and Jackson broke off their friendship.
Eventually, Gibbs managed to get them to bury the hatchet down in his basement. Jackson also returned to him his medal of honor due to Gibbs likewise arranging for it to be retrieved back, and likewise also used the funding he held off from Moore to fix the retirement house.
In "Honor Thy Father" he attended Jackson Gibbs's funeral and paid his respects to Jackson Gibbs and his condolences to Leroy Jethro Gibbs.
- Leroy Jethro Moore is portrayed by Billy Dee Williams, who is most well known for his role as Lando Calrissian from the Star Wars franchise.