MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
Collecting evidence. Forensic scientist looking through a microscope and using a pair of tweezers to collect evidence from a blood- stained dress. The evidence could be hair, fibres from clothing, human skin tissue, or an unknown material. Further analysis may link the evidence to suspects, placing them at the crime scene. The protective clothing and gloves are intended to prevent contamination of the evidence. The evidence must be photographed before it is removed, and the ruler (lower centre) shows the scale of the picture.
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