A substrate control allows the criminalist to connect evidence found at the scene of a crime to the suspect and/or victim.

Question

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A substrate control is actually a sample of the unaltered surface or material upon which a forensic sample was found, used for comparison to ensure that the surface itself does not interfere with or alter the analysis of the evidence. It does not directly connect evidence to a suspect or victim.

A Substrate Control Allows the Criminalist to Connect Evidence Found