A motorist used his cellphone to capture what appeared to be the violent arrest of a woman on the 10 Freeway near La Brea Avenue on Tuesday.The video, shot by David Diaz, showed the woman walking along the freeway when she was approached by an unidentified California Highway Patrol officer.It was not clear if words were exchanged between the two, but at one point the officer walked up behind the woman and grabbed her, the video showed.A struggle ensued, during which the officer appeared to knock the woman to the ground, straddled her body and began repeatedly punching her.Another man soon ran up to the officer and appeared to be helping him restrain the woman, the video showed.Video Credit https://www.youtube.com/channel/UCVasy6HOqMiXk5_COlLeTXQ