RICHMOND, Va. Jon Burkett, one of the hardest working crime reporters in the country, is leaving CBS 6 after more than a quarter century covering Richmond news. Burkett made the announcement on the latest episode of "Untold A WTVR Podcast," telling host Catie Beck that his departure is driven by health concerns and a desire to be more present for his family. "After 26 years, and on my 26-year anniversary date of September 29, I will walk away," …