Investigators are called to a scene where a kidnapping of a 12 year old girl was reported. Witnesses consistently state the girl was forced into a blue mini-van. The witnesses include several of her friends and two adults. The investigation has resulted in the identification and location of a van registered to Roger P. Anderson of 1594 Maple Drive and this matches the description of the vehicle used in the abduction. How many crime scenes should the police be immediately concerned with