Self-Defense OR Vigilante Justice? (QUANEESHA JOHNSON - Part 1)

On November 27th, 2022, Quaneesha Johnson shot Demonte Smith and killed him. Demonte Smith and Quaneesha were in a relationship, and 2 weeks ago, Demonte had beaten Quaneesha up. Demonte had punched Quaneesha's 12 year old son and had beaten an ex-girlfriend. The night before Demonte was shot, Quaneesha Johnson went out for a friend's birthday party. She stayed out late, and that made Demonte angry. He texted her saying he was going to "beat her a** on crip." Quaneesha called the cops three times because she was afraid to go home to Demonte. The cops came, but ultimately left Quaneesha and Demonte alone to "cool off" together inside the house. Minutes later, Quaneesha shot Demonte. Was this self-defense? Or a case of a woman who snapped and took the law into her own hands?