Chapter 12 elaborates on legal issues specific to forensic DNA Evidence. There is no doubt that DNA fingerprinting, one of the great discoveries of the late 20th century, has revolutionised forensic evidence. Its use in criminal investigation has grown in recent years and has become an increasingly powerful forensic tool for identifying or eliminating individuals as perpetrators of crime when biological evidence, such as saliva, tissue, blood, hair or semen is left at a crime scene.