St. Louis (CNN) — An 81-year-old mother is accused of shooting and killing her adult son at their suburban St. Louis home.
Police say Johanna Walker claimed her son attacked her with a knife.
Ballwin police responded to a call of shots fired at 1:00 in the morning.
Police say Walker suffered a knife injury to the hand.
She says her 41-year-old son, Brian Walker, attacked her with the knife, and she shot him in the chest twice.
Brian Walker was pronounced dead one hour later at the hospital.
Ballwin police say the mother was not arrested and at this point no charges have been filed.
The police investigation is ongoing.