Mamoun Sharif was an independent terrorist operating in the Eastern U.S.
A native of Lebanon, Sharif became an anti-American radical after his wife and two children were killed, accidentally, by a "not so smart" American smart bomb.
Waiting patiently for the opportunity to do America maximum damage, he became a paid informant for the CIA, helping them to arrest a gun-smuggling ring at a U.S. military base in Turkey.
As a reward for his efforts, the CIA relocated him to America, and paid him a small monthly stipend.
NCIS Special Agent Leroy Jethro Gibbs and Army CID Lt. Colonel Hollis Mann approached him for information about the bombing, and he gave them falsified evidence which led them to the "hideout" of an imaginary terrorist cell, that Sharif had built and booby-trapped himself. It was only because Ziva David managed to disarm the bomb that evidence was found that helped lead the NCIS team to the next bombing.
Sharif faked his own death, the apparent victim of a reprisal bombing by the terrorists he had supposedly betrayed. This left him free to hoodwink a "friend" of his, Abraham Moussalah, a simple-minded homeless man who hung out near Sharif's convenience store, into carrying a time bomb into the crowded Georgetown shopping promenade. With barely seconds to spare, Gibbs and his team identified Abraham and disarmed the bomb, realizing that Sharif had faked his death and made his getaway.
Sharif resurfaced several months later, having engineered a plot to poison a huge number of people with BZ nerve gas. Shrewdly, he had bought the gas from a corrupt employee of the company who manufactured it, on the pretext of making a ransom demand with a phony threat. For this reason, the employee assumed that the gas he stole was useless as a weapon, since it had been chemically modified. Instead, Sharif combined it with a chemical that enabled the gas to be absorbed through the skin. Gibbs inadvertently received a small dose of the gas, that caused him to hallucinate.
Before Sharif was able to distribute the weapon, NCIS tracked him to a railway station in D.C. Gibbs cornered him in a restroom, but Sharif overpowered him when he was disoriented by the gas. He explained his motives to Gibbs, then prepared to shoot him with Gibbs's own weapon, before he was shot dead by Col. Mann.
Personality and AbilitiesEdit
Though he only crossed paths with NCIS twice, Sharif was one of the most formidable terrorists they ever had to deal with. He was patient, methodical, and ingenious. He was also willing to wait as long as was necessary to create a plot able to kill as many Americans as possible.
Outwardly, he was a modest and kindly person. When catching Abraham stealing food from his store, Sharif rebuked him for it, but allowed him to keep the food, stating that, according to his country's beliefs, it was a sin to let a man go hungry. Only a day or so later, he duped Abraham into being an unwitting suicide bomber.
Sharif's greatest weapon was probably his independence. He belonged to no terrorist cell and operated almost completely alone, with few or no accomplices.
He also shrewdly appealed to other people's greed, and allowed them to think that he was motivated by it. The CIA trusted him because they paid him a retainer as an informant, and the corrupt chemical employee he tricked named Dane Hogan trusted that his plot's primary goal was money, not murder. Gibbs was one of the few people who discerned (probably based on personal experience) that Sharif had lost someone close to him and was seeking revenge.
His last words, before he was shot, were a repeat of the familiar saw that for every person killed in a conflict with America, ten more enemies were created.
- Colonel Fredrick Cooper (killed in sand-trap bombing at the Army-Navy club).
- Unknown proxy (trapped in burning store then blown up).
- Major John Maguire (poisoned with BZ gas).