The crime scene technician must realize that the value which may be derived from the laboratory examination of such evidence will depend almost entirely upon the use of proper methods to collect, identify, preserve, and transmit the specimen to the laboratory.
-- part contents for card part 3
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BLOODSTAINS ON PORTABLE OBJECTS: The article should not be packaged for shipment to the laboratory until it has thoroughly dried at normal room temperature. Clean paper should be placed under the drying object to catch any falling trace evidence and placed in the wrapping with the object. The drying MUST be a natural process, heat or electrical fans will physically change the sample.
Clean wrapping paper should be used to pack bloodstained articles. Each bloodstained article should be wrapped individually in order to prevent stains or other microscopic evidence from being transferred from one object to another.
When bloodstained clothing is submitted, the entire garment should be transmitted in order to assure a complete analysis. If the bloodstain appears on a large object, such as a rug, the size of which makes it impractical for shipment, the bloodstain should be removed by cutting it out. A portion of the unstained material/object should be included for control testing. IN ALL CASES, AS MUCH OF THE DRIED STAIN AS POSSIBLE SHOULD BE SUBMITTED.
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