As she was walking back down the stairs into the garage she reached to hand the rifle to her husband, Shane, when the gun unintentionally discharged.
Anastasia was shot in the head. She was taken to the local hospital where she was pronounced dead.
According to police, the couple had been firing the rifle the day before and Shane told investigators the gun had a light trigger pull. The police did not identify the specific model but said it was an AK-47 type rifle.