OAKLEY -- The city's top cop is leaving.
Oakley Police Chief Bani Kollo will be taking another assignment Jan. 6 now that the county has promoted him from lieutenant to the rank of captain.
The city contracts with Contra Costa County Sheriff's Department for police services.
Kollo, who has been with the department since 1991, has overseen Oakley's officers for the past 3½ years.
City officials and the sheriff's office will be screening applicants for police chief and are expected to make a decision next month.
-- Rowena Coetsee