This is the video being shown all over US networks at the moment.
It shows a scuffle between a police officer and two teenage girls in Seattle after the girls allegedly Jay-walk or cross the road at an undesignated spot.
The video footage shows officer, Ian Walsh, lashing out at the 17-year-old and punching her in the face.
The teenager reels backwards in shock from the blow before clutching her face while a bystander can be heard asking: ‘Are you serious?’
Police arrested the girl, Angel Rosenthal, and her friend, 19-year-old Marilyn Ellen Levias, both of whom have criminal records.
Seattle Police chiefs have launched an investigation into the alleged assault after viewing the video footage.
Civil rights activists are outraged and say the punch was an action of anger not self-defence.
