While arresting Rodney King for speeding four LAPD officers exercised excessive force. The four officers: Stacey Koon, Laurence Powell, Timothy Wind and Theodore Briseno had tasered him and struck him repeatedly with batons even after pulling him out of his car. In total King was hit fifty-six times. Footage of this is aired and subsequently televised, unbeknownst to the parties involved (Bates, Sastry).

Source (including image): 

Bates, Karen Grisby and Sastry, Anjuli. “When LA Erupted In Anger: A Look Back At The Rodney King Riots.” NPR, 26 April 2017.  https://www.npr.org/2017/04/26/524744989/when-la-erupted-in-anger-a-look-back-at-the-rodney-king-riots. Accessed 3 November 2021.