Which of the following is NOT considered forensic evidence?

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Forensic evidence refers to physical evidence that can be collected and analyzed to help solve a crime. It includes items that can be scientifically tested and linked to a crime scene or individual. Blood, hair, and fingerprints are all traditional forms of forensic evidence because they can be collected, preserved, and analyzed using scientific methods to provide information about who was present at a crime scene or to identify a suspect.

On the other hand, witness testimony does not fall under the category of forensic evidence. While it can provide valuable information in a criminal case, it is based on an individual's account of events and is not derived from physical or scientific analysis. Witness testimony can be influenced by factors such as personal perception, memory, and bias, thus making it less reliable as a form of forensic evidence compared to the other options listed.

In summary, the distinction lies in the nature of the evidence: forensic evidence is rooted in scientific analysis of physical items, while witness testimony is a subjective human account of what they observed.