BLOODSTAINS ON IMMOVABLE OBJECTS: Where bloodstains appear on fixed objects or on objects too bulky for shipment to the laboratory, the portion of the object bearing the stain should be cut off and sent to the laboratory if possible. Stains on objects which cannot be cut, such as concrete floors or metal safes, should be scraped into a pill box or onto a clean piece of paper. The paper should be folded carefully and placed in a vial or other suitable container.
WRAPPING BLOODSTAINS: Blood or body fluid evidence should never be placed in or protected by a plastic bag or plastic material. The plastic shuts out the air and causes rapid decomposition of the sample. Paper bags and wrapping paper are appropriate packaging material for any object bearing blood or body fluid evidence. This is because paper "breathes" and permits sufficient, though limited, ventilation.