A Brewster woman has been arrested for alleged possession of crack cocaine.  The Putnam County Sheriff's Office reports that a deputy was on patrol Saturday evening and saw a traffic violation on Danbury Road in Southeast.  While speaking with the driver and passengers, the Deputy saw several pieces of drug paraphernalia on the floor of the vehicle.  A passenger, later determined to be 51-year old Katherine Shanahan, had suspected crack cocaine in her possession.  Shanahan was charged with one count of possession and released for a future court appearance.  The driver was issued several traffic summonses and released.