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3 Cards in this Set
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Presumptive test |
Used to determine if an unknown substance might be a certain substance and can also show that it is definitely not a certain substance. For example, if a spot at a crime scene is thought to perhaps be blood a presumptive test can be used which will either show that it might be blood or that it is definitely not blood |
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Biology reporting |
Officers that have the same background and training as a specialist and probably have a strong background in statistics. They have a further 10 to 12 months of training. They determine the significance of the evidence, the probability that the sample came from someone else, using DNA profiling software. |
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Cuticle |
This is The outside covering of the hair and gives the hair it’s ability to resist chemical decomposition and to retain it structural features over a long time. These trades are what makes hair valuable as evidence because hairs can be recovered many years after a crime. Hair is off dinner covered from a body even when the rest is reduced to dry bones. Scalp hair often comes off a corpse in a clump as the skin sloughs |
