Still from NBClosangeles.com of video capturing CHP officer's beating of Marlene Pinnock None: NBClosangeles
Mon, Jul 7, 2014 3:01 PM EDT

The family of Marlene Pinnock is demanding answers and legal justice after a California highway patrol (CHP) officer beat her on a Los Angeles freeway last Tuesday, NBC reported. A passing driver captured video of the beating. It shows the CHP officer chasing Pinnock down the freeway, grabbing her and pummeling her with over a dozen blows.

"I never would have thought I would be standing here today talking on behalf of my mom because she was beaten on the side of a freeway by a CHP officer that was sworn to protect her. That makes me scared," Pinnock's daughter Maisha Allum said during a press conference, NBC reported.

CHP has maintained that Pinnock was walking on the freeway and endangering herself and the officer whose name has not been released and is on leave pending an internal investigation. Pinnock's family has not explained why she was walking on the freeway.

"The tape only shows a small part of what transpired," CHP Assistant Chief Chris O'Quinn said on Friday, KTLA reported. "There were events that led up to this. Until all that's collected and put into perspective, we aren't going to be able to make a determination."

The Pinnock family has hired prominent civil rights attorney John Burris to help file their suit, which they say they'll file this week.