Marcia Clark

California native Marcia Clark is the author of Guilt by Association, Guilt by Degrees, Killer Ambition, and The Competition, all part of the Rachel Knight series. A practicing criminal lawyer since 1979, she joined the Los Angeles District Attorney's office in 1981, where she served as prosecutor for the trials of Robert Bardo, convicted of killing actress Rebecca Schaeffer, and, most notably, O. J. Simpson. The bestselling Without a Doubt, which she cowrote, chronicles her work on the Simpson trial. Clark has been a frequent commentator on a variety of shows and networks, including Today, Good Morning America, The Oprah Winfrey Show, CNN, and MSNBC, as well as a legal correspondent for Entertainment Tonight. Follow Marcia on Twitter at @thatmarciaclark