👉 A witness fluid, also known as a witness's bodily fluid or exudate, refers to any substance secreted by the body during an injury or illness that can be detected at the site of trauma or through medical tests. These fluids can include blood, pus, serous fluid, and other bodily secretions like sweat or saliva. They provide valuable diagnostic information about the nature and extent of an injury, infection, or disease. For instance, the presence and characteristics of a wound's fluid can help determine if it's an acute injury versus a chronic condition, or if there's an infection involved. In forensic science, witness fluids are crucial for identifying individuals and reconstructing events surrounding accidents or crimes.
