Mark A. Peterson is an American Republican politician who served as the district attorney for Contra Costa County in California from 2010 to 2017.
[2] Prior to being elected district attorney for Contra Costa County, Peterson served on the city council of Concord, California.
[5] In December 2016 Peterson admitted that between 2011 and 2015 he used $66,372 from his campaign account for personal expenses such as groceries, jewelry store bills and movie tickets over 600 times.
In June 2017, Xavier Becerra, the California Attorney General, opened a criminal investigation against Peterson.
[6] On June 14, 2017, Peterson pleaded no contest to one count of perjury as part of a plea bargain agreement in which all 12 other charges were dropped.