AMMAN, Jordan — A military court is expected to rule Monday in the murder trial of a Jordanian soldier accused of killing three US military trainers in a shooting spree at a Jordanian air base.

The high-profile case had caused some friction between allies Jordan and the United States. Jordan initially suggested the US troops triggered the shooting by disobeying gate procedures, a claim that was disputed by the United States and later withdrawn.

The defendant, First Sergeant Marik al-Tuwayha, pleaded ‘‘not guilty.’’ If convicted, he faces life in prison. In Jordan, that can mean a 20-year term, with good behavior.

Earlier this year, a Jordanian soldier who was convicted of killing seven Israeli schoolgirls in a 1997 shooting rampage was released after 20 years.

The US soldiers were killed Nov. 4 when their convoy came under fire at the entrance of an air base in southern Jordan.

The victims were 27-year-old Staff Sergeant Matthew C. Lewellen of Kirksville, Miss.; 30-year-old Staff Sergeant Kevin J. McEnroe of Tucson; and 27-year-old Staff Sergeant James F. Moriarty of Kerrville, Texas.

Relatives of the slain US Army Green Berets attended parts of the month-long trial in Jordan’s capital of Amman.

Some of the family members criticized the legal proceedings and potential punishment as inadequate.

‘‘We’ve felt discouraged and disappointed with every way Jordan has handled this case since the moment the bullets were first fired,’’ said Melissa Moriarty, the sergeant’s sister.

‘‘What is on the table is a measly 20-year ‘life’ sentence, for taking three lives. It’s all rather depressing and painfully disappointing,’’ she said. ‘‘This isn’t going to provide some kind of closure, as some may think.’’

Associated Press