Forensic Biology Forensic Biology is the application of concepts and procedures used in the biological sciences, typically in a legal context. Forensic biologists analyze cellular and tissue samples, as well as physiological fluids that are relevant to a legal investigation. These techniques are also definitive in the identification of paternity/kinship relationships.Forensic biologists examine blood and other bodily fluids, hair, bones, insects and plant and animal remains to help identify victims and support criminal investigations. ... Senior-level forensic biologists may testify in court about their findings. Forensic biologists may become experts in: DNA analysis.