Which of the following is not considered physical evidence?

Physical evidence refers to tangible objects that can be collected and analyzed in a criminal investigation. This type of evidence can support or refute claims made during the investigation and is often crucial in establishing a connection between a suspect and the crime.

Witness statements, while they can provide critical information and context about an incident, are considered testimonial evidence rather than physical evidence. This distinction is important because testimonial evidence relies on the recollections and perspectives of individuals, which may vary in reliability and can be influenced by multiple factors.

In contrast, weapons, electronics, and toxicological samples are all forms of physical evidence. Weapons can be examined for fingerprints, DNA, or ballistic matches; electronics may contain data pertinent to the case; and toxicological samples can reveal substances that may have contributed to a crime or death. Each of these types can be directly analyzed, providing concrete information that can support the investigative process.

Thus, the identification of witness statements as the answer reflects an understanding of the fundamental difference between physical and testimonial evidence in criminal investigations.