Forensic biology is a scientific method of examining, testing, and probing evidence from a crime scene investigation. When you review the history of forensics, you see that there are varying timelines. The history, as complied by the American College of Forensic Examiners, began as early as the 4,000 BC. The modern association of forensic biology has been developed into many subdivisions such as toxicology, pathology, anthropology, and odontology, just to name a few.