Name one common type of physical evidence.

Fingerprints are a common type of physical evidence in criminal investigations due to their unique characteristics and reliability in identification. Each individual's fingerprints possess distinct patterns that do not change over time, making them a powerful tool for linking a suspect to a crime scene. Law enforcement professionals utilize fingerprints collected from various surfaces at a crime scene to match with known prints from suspects or victims, helping to establish connections and potentially confirm or exclude individuals in ongoing investigations. Unlike witness testimonies or confessions, which can be subjective and influenced by various factors, fingerprints provide objective, scientifically validated evidence that can significantly impact the outcome of legal proceedings.