The US police officer filmed wrestling a black girl to the ground and pointing his gun at teenagers in Texas has stepped down, officials say.
They say Cpl Eric Casebolt, aged 41, submitted his resignation "on his own will" earlier on Tuesday.
In a video - filmed on Friday in McKinney - Cpl Casebolt, who is white, is seen pinning 15-year-old Dajerria Becton to the ground with his knees.
Police said he was responding to disturbances reports at a pool party.
Cpl Casebolt was placed on administrative leave following the incident.
Hundreds of people later marched at the scene, demanding that the corporal be dismissed.