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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In addition to being a political and religious leader, Bishop Reginald Jackson also served as chairman of the Board of Trustees of Morris Brown College. (Ben Gray/AJC)

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Carleigh Knight (left) and her sister, Natalie Rogovin, look at Christmas ornaments while shopping at Kudzu Antiques + Modern in Decatur on Tuesday, Nov. 25, 2025. (Natrice Miller/AJC)

Credit: Natrice Miller