Lauren Dixon called the shooting unjustified, but police have a different story.
Danny Roberts, Chief of the Butner Department of Public Safety, said officers went to Dixon's home in June after she called them to report her estranged husband was circling the home.
When they were let into the home, they say the dog lunged at them again and again, and they were forced to act.
"Any pet owner would be upset if something happened to their pet, but the officers felt they were in danger and did what they thought they had to do," said Roberts.
But Dixon said the dog, named Buddy, didn't have to be killed.
"I said 'I called you guys for help, not to kill my dog, you killed my dog.' What do you do when someone shoots a member of your family? He was like my son," she explained.
Roberts said his department conducted an internal investigation of the incident and the officers involved were cleared.