On the scenario Outbreak once you are outside the swat car get back in and take 3 shot guns and present two of the to your partners once this is done pick up any items wanted from the car you will find a magnum and many bullets if you have dropped any items in the swat car and leave them they will not be available when you come back to get them. The reason you give two shotguns to your CPU's is because they will protect you at the end while you are finding the detenator pieces.