(Salt Lake City, UT)  –  A popular Salt Lake City news anchor is being investigated for drunk driving.  KUTV News anchor Shauna Marshall was arrested on suspicion of DUI on I-215 sometime after midnight last night.  Utah Highway Patrol says they pulled over a Land Rover she was driving because it was traveling in the far left lane under the speed limit.  She was also arrested for open container, using plates registered to another car, and failing to register or driving with an expired registration.Â