The shooter, Jordanian soldier 1st Sgt. Marik al-Tuwayha, plead "not guilty". The country hosts several hundred US military contractors and some U.S. F-16 fighter jets are stationed there, according to Reuters, which reports the usa uses Jordanian airfields to strike targets in Syria.
Al-Tawaiha said he had fired at the US troops because he believed that the base was under attack.
His father Jim described the sentence as "only the first step" in a letter to the Jordanian embassy on Monday, the AP reported. Relatives said the video showed that the gunfight lasted about six minutes and that Sergeant Tawayha had reloaded and opened fire, even though the Americans waved their hands and yelled: "We're Americans!"
Jordan hosts several hundred USA contractors in a military cooperation program which includes the stationing of U.S. F-16 fighter jets.
He was sentenced to life in prison with hard labor.
The statement said that despite the tragedy, Jordan continues to be a strategic partner and reiterated that the U.S. soldiers followed the usual procedures upon their arrival at the airbase.More news: Gujarat High Court junks Essar Steel plea against RBI's insolvency order
The defendant, al-Tuwayha, as well as some other gate guards on duty that night, testified that they heard what might have been a gun shot coming from the direction of the USA convey.
Members of the families of the dead were present at the court but did not speak to the press. He said the US respects Jordan's military process and praised Jordan for adhering to its own laws in resolving the case expeditiously. It said that all three had been following "established procedures for entering the gate".
The video was shown to the family by USA law enforcement, but has not been released to the public.
Jordan said after the incident previous year that the U.S. troops had disobeyed the orders of the Jordanian military at the gate of the base and triggered the shooting.
"In this verdict, nobody comes out happy", she said.
In Jordan, life in prison can mean 20 years, with time off for good behavior.
Monday's verdict is still subject to appeal, his lawyer Sobhi al-Mawas told Anadolu Agency. The kingdom hosts several hundred US contractors, and allows the United States to use Jordanian airfields.