A month before the dissolution of the combined Savannah-Chatham Metropolitan Police Dept. he has led for the last three years, Chief Joseph "Jack" Lumpkin announced that he will be leaving the post to take a job as Director of Public Safety in DeKalb County, Ga.His first day on the new job will be Jan. 28 — four days before SCMPD dissolves into two separate agencies.
"I am of the opinion forward thinking internal and external customers will attest that I left this agency much better than I found it," Lumpkin wrote in his resignation letter to the city.…