A Gwinnett County Magistrate Court judge allowed the case of a 15-year-old Braselton girl charged with murdering her mother to proceed Friday to Superior Court.

The girl is accused of shooting her mother, 1st Sgt. Karen Moore, 42, to death in their home on Sahale Falls Drive in Braselton on April 6.

According to the arrest report, she's also accused of leaving her dead on the couch overnight while she drove to Buford to pick up her boyfriend.

She was arrested the following day when she and her boyfriend, Christopher Nieves, 17, of Buford, asked neighbors for help starting her Volkswagen, Braselton police said.

Nieves was arrested the same day after he admitted, and the girl confirmed, they had sex in the house after they returned early in the morning on April 7.

He was charged with statutory rape.

Braselton Assistant Police Chief Lou Solis recounted his police report for Deputy Chief District Attorney Lisa Jones Friday afternoon in Lawrenceville. Lucas Harsh and James McGinnis, attorneys for the girl, did not contest that probable cause existed to try her for murder.

The girl sat motionless and silent during the nearly hourlong hearing Friday. She did not testify.

According to state law, juveniles older than 13 charged with murder are to be tried as adults.

Police believe the girl shot Moore once in the head while the U.S. Army recruiter was sitting on the couch in the living room on the evening of April 6.

The girl then drove her Volkswagen to Buford to pick up Nieves and returned to the house in Braselton around 2 a.m., according to the police report.

The two teenagers awoke at about 10 a.m. April 7 and walked to Joe's Pizza for lunch, though the girl told police she did not eat.

They tried to start the Volkswagen, and then Moore's Mercedes, but could not get the cars running. They asked a neighbor at noon to jump the cars, though they still would not start. About a half hour later, Nieves returned to the neighbor's house and said Moore was dead on the couch, the neighbor told Braselton police.

Investigators treated the death as a suicide until they found a gun in the driver's side door of the Volkswagen, Solis told the court. Police then separated the teenagers and took them to the Braselton police station for questioning.

According to the police report and Solis' testimony, the girl admitted to firing the gun at her mother.

Solis said she gave three different versions of how the shooting took place. According to the first version, Moore was showing the girl how to use the gun and it went off.

Moore told the girl to go and slumped on the couch. In the second version, Moore and the girl were arguing about Nieves and her performance in school.

During the argument, she snapped, Solis said Friday, got the 9 mm pistol out of a downstairs closet and shot Moore. In the third version there was no argument.

Nieves told police that he did not know Moore was dead and did not see the pool of blood near Moore's body.

The Georgia Bureau of Investigation is assisting in the investigation. Solis said Friday the GBI kept as evidence a U.S. government laptop Moore was using and two of Moore's cell phones.

GBI agents swabbed Nieves' hand for gun powder residue, Solis said, but not the girl. Solis said Friday he did not know the results of the test.

Moore's husband is a sergeant major in the Army and their son is an Army Reservist, both of whom were stationed in Alabama at the time. The girl's father gave permission for police to talk with the daughter, whom police said admitted to discharging the firearm after a fight with her mother.

Both Moore's husband and son returned to Braselton on April 7.