Answer:
Step-by-step explanation:
The five steps recommended by the Federal Bureau of Investigation for collecting and preserving evidence are (1) obtaining it legally; (2) describing the evidence in detailed notes; (3) identifying it accurately and positively; (4) packaging it properly for identification, storage, or shipment to the laboratory; and (5) establishing and maintaining the chain of custody. Specific precautions should be taken in handling weapons used in an attack, clothing, firearms, blood stains, seminal stains, fingernail scrapings, hairs, fibers, drugs, and poisons. The investigator's equipment should include fingerprint accessories, a vacuum sweeper with special filters, containers, tools, magnifiers, casting equipment, and ultraviolet light equipment. The success of the laboratory technician's analysis depends directly on the investigator for the quality of the physical evidence. Photographs and 13 reference notes are provided.