upon the totality of the facts. >> without forensic science, virginia mcginnis today would still be looking for victims. she probably would still be killing. she would be burning houses and she would be collecting insurance with your premiums. california police had several suspects in the robbery and murder of a retired couple. unfortunately, the forensic evidence was inconclusive. ten years later, a determined forensic scientist with materials used by dentists found evidence that had previously been overlooked, and in so doing, made scientific history. bakersfield, california, known for its oil fields, wide open spaces and an aggressive crime investigation unit.