A forensic biologist applies the principles of biology to law enforcement applications. Forensic biologists can work in the lab and in the field with a wide variety of substances and samples, from DNA evidence which needs to be identified to animals which need to be necropsied as part of an investigation. Forensic biologists have degrees in forensic science, or in biology with a concentration in forensics, and they may work for government agencies, private labs, universities, and consulting companies.