Several cops from the Duke University police force were also in the emergency-room area that night, including an officer named Christopher Day, who had apparently been standing with Sergeant Shelton when he told his watch commander about the accusers changing stories. His report of the incident reflected the prevailing view among the cops who had dealt with the woman: The victim changed her story several times, Day wrote, and eventually Durham Police stated that charges would not exceed misdemeanor simple assault against the occupants of 610 N. Buchanan.
http://www.newyorker.com/archive/2006/09/04/060904fa_fact?currentPage=2