The 27-year-old son of a Lilburn couple heard the arguing going on inside the home Saturday afternoon. Then he heard the shots.

When he went to see what happened, Lilburn police said, the son found his father with a pistol in his hand and his mother lying on the floor.

"The son left the room for fear of his own safety and called 911," Lilburn police Capt. Thom Bardugon said in a statement on the city's website. "After calling 911, the son returned to his mother and attempted CPR, without success."

By the time police arrived at the home in the 5100 block of Woodfall Drive about 3 p.m., Rosemarie Lebert, 56, was dead, Bardugon said.

She died from multiple gunshot wounds, according to a preliminary report from the Gwinnett County Medical Examiner’s office.

Her husband, Rupert Clarke, 59, surrendered without incident and was arrested, Bardugon said.

The GBI was called in to process the crime scene and collected several .40 caliber casings and a .40 caliber pistol, police said, with the casings close to Lebert’s body.

Police said Clarke did not make any statements to them. He was taken to the Gwinnett County Detention Center, where he remained Monday on charges of murder and aggravated assault.