A U.S. Navy lieutenant, Emmanuel Dewayne Coble, has been charged with first-degree murder in the killing of his pregnant girlfriend, Raquiah Paulette King

 A U.S. Navy lieutenant has been charged with first-degree murder in the killing of his pregnant girlfriend.

Emmanuel Dewayne Coble, 27, has also been charged with use of a firearm in the commission of murder.

Raquiah Paulette King, 20, was found July 21 in Hanover County off the side of the road in the ditch line.

She was fatally shot.

Hanover Sheriff's Office spokesman Lt. James Cooper tells PEOPLE that Coble and King were in a relationship and King was three months pregnant at the time of her death.

Prosecutors plan to file charges in connection with the death of the fetus.

"I am incredibly proud of the diligence of our investigators and our law enforcement partners which led to the arrest of Emmanuel Coble," Sheriff Colonel David R. Hines said in a statement. "This arrest is the first step in bringing justice to Raquiah King and her family."