Mount Pleasant Police using a K-9 recovered over two pounds of marijuana following a traffic stop late Friday night.   According to a news release, Mount Pleasant officers stopped a vehicle on State Highway 31 near Margery Drive in Mount Pleasant around 11:10 pm.  When the vehicle pulled over, the driver fled on foot towards a nearby apartment building.  He was seen carrying a large, white plastic grocery bag.   A K-9 was brought in and tracked the suspect to the corner of a nearby building where the plastic bag was found.   Inside the bag, the officers discovered the marijuana.   The suspect, described as a black male wearing a white T-shirt, blue jeans and a jacket was not located.   The incident is under investigation by the Mount Pleasant Police.