Clayton County voters will go to the polls to select their county leaders from a hefty slate of candidates. The May 24 primary features some 40 people vying for various offices in one of the largest fields in a decade. Local races include school board, district attorney, sheriff, and board of commissioners. Here’s a look at candidates in some of the key races: Clarence E. Cox III, 53, lives in Hampton. Job: Former Police Chief of Clayton County Public Schools. Top priorities: Create more access to and more transparency in the Sheriff’s Office; foster an environment in which citizens believe there will be an impartial, fair application of the law; fulfilling the constitutional responsibilities of the Sheriff’s Office.