A former sergeant with the Cobb County Sheriff’s Office has announced his intention to challenge Sheriff Neil Warren over leadership of the agency in the 2020 election.

Jimmy Herndon, a Democrat, launched his website and fundraising campaign over the weekend. His platform, as described on his website, emphasizes financial accountability, transparency, employee morale and community trust.

While 2020 qualifying isn’t until next year, Cobb is expected to be highly competitive in many races and candidates have already begun fundraising and campaigning.

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Fulton County Commission Chairman Robb Pitts attended the Buckhead going-away dinner for Herschel Walker and Bill White, Oct. 15, 2025. (Courtesy of Bill White)

Credit: Courtesy Bill White

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Members of the conversion crew take a break as the main scoreboard is lowered to the floor to be worked on as the arena gets ready for the next concert at State Farm Arena, Thursday, October 2, 2025, in Atlanta. The crew was working on creating a stage for the Friday, Oct. 3 Maxwell concert. (Jason Getz/AJC)

Credit: Jason Getz / Jason.Getz@ajc.com