(Portland, OR)  --  Police are still looking for a suspect in the murder of a woman at a Northeast Portland hotel.  Twenty-four-year-old Ashley Renee Benson of Vancouver was found dead in a stairwell Friday morning at the DoubleTree Hotel.  Portland police also say Benson was a victim of sex trafficking.  Anyone with information helpful to investigators is asked to call the Portland Police Bureau.>>Crash Injures Three In Tillamook