A Glen Burnie man shot and killed two people yesterday afternoon before he was fatally shot by an off-duty police officer who was the son of one of the victims, Anne Arundel County police said.

David Neal Wolle, 39, of Glen Burnie was killed by off-duty Anne Arundel police Officer John Hittle moments after Wolle killed Hittle's father, 59-year-old Charles C. Hittle Jr., police said.

The incident began just after 2 p.m. yesterday, police said, as Wolle left his apartment at 7501 Furnace Branch Rd. with a woman identified as Geanett Gay. Police said Gay's mother, 63-year-old Grace Cory, confronted the couple in the parking lot and began arguing with her daughter about leaving with the man.

During the argument, police said, Wolle went to his pickup truck and returned with a 12-gauge shotgun, firing at Cory and striking her in the chest. Cory, of Pasadena, Md., was pronounced dead at the scene.

Geanett Gay then fled the scene screaming for help, police said. A woman in a car came to Gay's aid, but Wolle forced the two out of the car and stole the vehicle, police said.

Wolle drove to the Colonial Arms gun shop at the corner of Old Annapolis Road and Maple Lane, police said. With a sawed-off shotgun, Wolle tried to rob the store of a .44-caliber handgun, police said.

During the robbery, the elder Hittle, who lived in Lithica, Md., came out from the rear of the store, which he owned, police said. At Wolle's command, Hittle raised his arms in the air and tried to calm Wolle, police said. However, Wolle fired the shotgun, striking Hittle in the head. Moments later, Hittle's son, a four-year police department veteran, appeared and fired once with a 9mm handgun, killing Wolle. An Anne Arundel police spokesman said police would investigate the younger Hittle's shooting of the gunman.