William Decker

William Decker was an retired NCIS Special Agent. He worked with former NCIS Director Jennifer Shepard and NCIS Special Agent Leroy Jethro Gibbs. He retired in 2007 and died in 2008. 
==Biography==
===Pre-Series===
Not much was revealed about Decker's past except for the fact that he joined NIS (the original name NCIS had used) some time in 1996, the same year that NIS agent Michael Franks retired.
Three years later, in 1999, Decker was given the assignment of working with Jenny and Gibbs courtesy of NCIS Special Agent Riley McCallister, the objective being that the three of them were to travel to Paris, France to retrieve a Russian spy ring.
Decker was the contact agent, establishing the cover identities for Gibbs and Jenny while even handling communications. He presumably gave Gibbs and Jenny their assignments with Gibbs being assigned to kill Anatoly Zhukov, a hitman for the KGB and Svetlana Chernitskaya, Zhukov's fiancé. Even though Gibbs shot Zhukov dead, Jenny was unable to bring herself to kill Svetlana and let the other woman go, presumably lying to Gibbs and Decker that she had eliminated Svetlana. 
During the mission, the code word, "Oshimaida" was created so that it would be used as a warning if Gibbs, Jenny or Decker found out that their respective covers had been compromised. Eventually, the mission was declared a success and the three NIS agents left France, returning to America where they presumably went their separate ways. 
Decker attended a Crime Analysts Conference in 2002 and two years later, celebrated Hopkins-De La Hoya on September 18, 2004.
Sometime later, Decker met Sasha Gordon who became his girlfriend.
In 2007, Decker officially retired from NCIS with a party being held to mark the occasion.
===NCIS Season 5===
By 2008, Decker had relocated to Los Angeles, California and was living in a house with Sasha.
However, in May 2008, Decker learnt that Riley McCallister had given up his name to Svetlana who responded by sending a man using the alias, Viggo Drantyev along with some men after him.
The group tracked Decker and tortured him, hoping to retrieve more information such as the identities of the other two agents involved in the case but Decker refused, forcing the team to kill him, presumably by using some lethal drugs to mimic the signs of a heart attack with Decker dying as a result.
Some time later, Decker's remains were discovered and he was buried at a ceremony in Los Angeles. Jenny attended the funeral with NCIS Special Agent Anthony DiNozzo Junior and Mossad officer Ziva David as they were protecting her. After Director Shepard overheard the word Oshimaida at the funeral she knew her cover was blown from the operation years ago and that Decker was murdered. She enlisted the help of Michael Franks and went off to investigate the circumstances of his death which lead to the Shootout In Decker's Diner that left Jenny herself and the assassins including Viggo dead.
Decker along with all the other victims Svetlana had killed during her campaign of revenge was later avenged when Michael Franks, Gibbs's mentor and friend shot her dead in the back seconds after Svetlana who had arrived at Jenny's house attempted to kill Gibbs.
==Personality==
During his torture at the hands of Viggo and his men, Decker refused to give up any kind of information concerning the mission in Paris, suggesting he had a strong will or that he had been trained to avoid disclosing knowledge that would ultimately jeopardize NCIS operations as well as the lives of his former colleagues.
==Physical Appearance==
Category:Americans in NCIS
Category:One-Off NCIS Characters
Category:NCIS Agents in NCIS
Category:Former NCIS Members in NCIS
Category:Civilians in NCIS
Category:Murder Victims in NCIS
Category:Deceased