HARRIMAN (WATE) – There’s a desperate plea from the family of the U.S soldier who was killed last weekend in Harriman.

Marstratton Gordon, 23, was stationed in Fort Campbell, Kentucky, and his family says he was killed while on weekend deployment. Gordon’s family says they have a lot of questions about their loved one’s death.

“We got a young man that was in the military that had a promising career ahead of him, that had big goals. It’s devastating to my wife, my family, his friends and the people that even knew him,” said James Turner, Gordon’s father.

While on weekend deployment visiting his girlfriend in Harriman, investigators say a fight broke out and Gordon was killed. A 15-year-old is believed to have pulled the trigger. The teen hasn’t been charged yet, making things even more confusing for Gordon’s dad.Previous story: Harriman teen accused of shooting, killing U.S. Army soldier

“He needs to be tried as an adult, because if he’s old enough to pick that gun up and shoot my son and kill him, he’s old enough to suffer the consequences as a grown man,” said Turner.

Even more shocking, Turner says the 15-year-old was at his home a couple of months ago swimming in his pool. He thought Gordon and the teen had a good relationship

“He was a well-liked person. He was a jokester. He loved life. He loved his friends,” said Turner.

Gordon’s best friends agree that this doesn’t make sense to them.

“He told me that he loved them. He told me he loved the family. He told me that he thought he was going to grow old with that family. I remember him saying those things,” said Noah Bachman

Now all family and friends want are answers.

“The question is how he got access to the gun to shoot my son. He needs to be held accountable for his actions,” said Turner.

The 15-year-old’s name has not been released yet. An autopsy is being done to determine an exact cause of death. TBI is assisting Harriman police and the district attorney general with this investigation.