Appleton Police aren’t saying much about a mysterious scene discovered Thursday morning — because they don’t know much, yet.  Officers were called about suspicious activity in the neighborhood and they arrived to find what appeared to be blood covering the driver’s side of a parked car.  Crime scene technicians responded and yellow tape was used to keep citizens clear.  There were no bodies in or around the car and no indication where the red-colored substance came from.  People living nearby say the white vehicle had been parked there overnight.