Which type of evidence is generally considered the most reliable in criminal investigations?

Physical evidence is often regarded as the most reliable type of evidence in criminal investigations due to its objective nature. This type of evidence includes tangible items such as fingerprints, DNA, firearms, and other forensic materials that can be analyzed and examined. Unlike testimonial evidence, which can be influenced by a witness's perception or memory, physical evidence provides direct, scientific proof that can corroborate or contradict a narrative.

The reliability of physical evidence stems from its ability to withstand rigorous scrutiny and testing, often resulting in definitive conclusions regarding the facts of a case. For example, DNA evidence can conclusively link a suspect to a crime scene, making it a powerful tool in establishing guilt or innocence. As a result, physical evidence is prioritized in investigations because it typically offers a clearer, more accurate picture of events than other forms of evidence, which can be subjective or circumstantial in nature.