What is biological evidence?

Biological evidence refers to physical evidence obtained from a living organism or substances produced by a living organism. It can consist of biological fluids such as blood, saliva, semen, and urine and tissues such as hair, skin, and nails. Biological evidence can play a crucial role in forensic investigations, aiding in the identification of suspects and providing information about a crime scene. DNA analysis is often used to extract information from biological evidence, helping to link suspects to a crime or rule them out as a suspect. Biological evidence can also provide information about the victim and their condition, such as drug or alcohol use, time of death, and cause of death. It is important that biological evidence is collected and handled properly, as mishandling or contamination can compromise results and damage the integrity of the evidence.