The Brief Kalema Jackson, a former Atlanta police officer, is challenging Mayor Andre Dickens in the Nov. 4 election. Former Atlanta police officer Kalema Jackson is making his case to voters as he challenges Mayor Andre Dickens in the city’s upcoming election. "One of my main goals is to improve infrastructure. The candidate spent 13 years with the Atlanta Police Department, training in the same class as current Chief Darin Schierbaum. As the election approaches, Jackson said he believes he can unite Atlanta residents.