On November 4, 2016, three U.S. Army Special Forces operators were shot dead as they were re-entering the King Faisal Air Base, Jordan. Their killer, Jordanian Air Force Sergeant Ma’arik al-Tawayha, was stopped by another Green Beret before he could kill more Americans.

He was arrested, and after a controversial trial, was sentenced to life in prison, which often translates to 20 years behind bars in the Jordanian legal system.

The three Green Berets killed on that day — Sergeant First Class Matthew Lewellen, Staff Sergeant Kevin McEnroe, and Staff Sergeant James F. Moriarty — were assigned to the 5th Special Forces Group.

Now their families have sent a letter to Congress in an attempt to have the Jordanian airman extradited in the U.S. to face justice.

James R. Moriarty, the father of SSG Moriarty, said to the Military Times that he hopes for an extradition “because I want him interviewed again about what happened. And maybe this time we’ll get the full story.”

An extradition, however, seems unlikely given the complicated tribe system of Jordan and the politics behind it. A particular point of friction will be the U.S.-Jordan extradition treaty, which was signed in 1995. Although the treaty was signed, it wasn’t approved by the Jordanian Parliament, thus allowing the Jordanian government to deny al-Tawayha’s extradition to America in an attempt to placate domestic opposition.

From the Jordanian perspective, or at least that of the killer’s tribe, the Howeitat, the Jordanian Air Force sergeant was acting within his rules of engagement, and the life-in-prison sentence is overblown. That perspective, however, defies logic and evidence. The Jordanian Airman had been a regular at the base’s gate checkpoint and had seen Americans come and go daily. And, as the video footage of the shooting clearly shows, the Special Forces operators tried to deescalate after the initial burst of fire by waving their arms, indicating that they are friendlies.

In an interview with the New York Times, a Green Beret who was present in the shootout said that “We kept yelling in English and Arabic, saying we were friends… I put my gun down, raised my hands a little and he took a shot at me… and he kept shooting. Eventually, we realized it wasn’t an accident.”