Richmond Times-Dispatch - 2 hours, 12 minutes agoA former Richmond narcotics detective pleaded guilty this week in Chesterfield County to his second drunken-driving charge in 20 months. Mark E. Dunn, 47, a 22-year Richmond police veteran, was convicted Monday in Chesterfield General District Court of first-offense driving under the influence. The charge was reduced from second-offense DUI, which is a more serious charge.