Video shows moments before police killed Niani Finlayson seconds after responding to her 911 call

The Los Angeles sheriff's department (LASD) released body-camera footage on Friday of an officer fatally shooting Niani Finlayson, 27, who had called 911 for help during a domestic violence incident.

The footage from the 4 December encounter showed that deputy Ty Shelton shot Finlayson four times within roughly three seconds of entering her home.

The killing in Lancaster, a city in north LA county, sparked national outrage last week, with civil rights activists questioning why deputies failed to de-escalate the conflict and instead used fatal force against a woman who had sought their assistance and was a victim of abuse.

In a statement Friday, LASD said the deputy, whom the department previously identified as Shelton, had been removed from the field as an investigation continued, in line with standard policy

• Police killed Niani Finlayson seconds after responding to her 911 call, video shows