DNA TESTS in Criminal Investigation and Paternity Disputes [A Modern Scientific Technique] In terms of forensic DNA analysis, there is a variety of possible sources of DNA evidence. The more useful sources include blood, semen, vaginal fluid, nasal secretions and hair with roots. It is theoretically possible to obtain DNA from evidence such as urine, faeces and dead skin cells, though this is often classed as a poor source due to the lack of intact cells and high levels of contaminants preventing successful analysis. Subject Wise Index meticulously arranged in proper alphabetical order. The work has been primarily written for Medical Practitioner, Lawyers, Judges, Members of the Bar and Bench, Solicitors and other Professionals who are engaged in interpreting the correct legal position.