One of the pit bulls that authorities say

had a history of aggression.

Goochland County Sheriff James Agnew, who recently

on what deputies saw at the scene of 22-year-old Bethany Lynn Stephens' death in order to counter rumors wild animal involvement, says the pit bull, named Pacman, had previously been adopted and returned because of concerning behavior.

Stephens, who investigators believe was mauled by her two dogs while out on a walk last week, raised her other dog, Tonka, since he was a puppy.

Pacman had been owned by the previous owner for about a year. According to the sheriff’s office, the dog snapped at her on a couple of occasions while she was pregnant. As a result, the previous owner didn’t feel comfortable keeping the dog and so she allowed Stephens to adopt from her.

The two dogs were from the same litter.

Investigators said Stephens, weighing about 100 pounds, was killed by the dogs, which had a combined weight of about twice hers. She was found with defensive wounds on her hands and arms, and the dogs were found with blood on them and deputies observed them eating parts of Stephens' corpse.

Both dogs are now at the Department of Agriculture and Consumer Service’s lab for a necropsy to determine if they had rabies.