Never before has criminal justice rested so heavily on scientific evidence. With ever-more sophisticated and powerful techniques at their disposal, forensic scientists have an unprecedented ability to help solve even the most complex cases. Angela Gallop has been a forensic scientist for over 40 years. After joining the Forensic Science Service, the first crime scene she attended was for a case involving the Yorkshire Ripper. As well as working on a wide range of cases in many countries around the world, she is now the most sought-after forensic scientist in the UK, where she has helped solve numerous high-profile cases.