Question:  Laurence Michael Powell was one how many officers involved in the beating of Rodney King, a taxi driver who became internationally known after a tape was released of him being beaten on March 3, 1991, by Los Angeles Police Department officers?
Sentence (from "Gregory Powell (murderer)"): Infamously known as the "Onion Field" Killer, Powell's story was depicted in Joseph Wambaugh's 1973 non-fiction book, "The Onion Field".
Relevant evidence: No