NASHVILLE, Tenn. (WKRN) — Metro police are investigating after a 31-year-old woman told officers she shot and killed her boyfriend because he assaulted her and threatened her life.

Officers said the woman called 911 around 12:40 a.m. from her apartment on Swiss Avenue, off Old Hickory Boulevard and Nolensville Pike, to report she had fatally shot her 38-year-old boyfriend, Anthony Davis, in self-defense.

She told detectives that Davis had grabbed her by the neck during an argument and threatened to kill her, police explained. When she got away, she said she retrieved Davis’ pistol from another room, confronted him and then shot him as he advanced on her.

Davis was pronounced dead at the apartment, investigators said.

The couple had a history of domestic incidents, according to police.

The 31-year-old woman has not been charged pending the completion of the investigation and a review by the District Attorney’s Office.