Decisions concerning individuals are made based on the DNA fingerprinting technique, e.g. in the courts of law. Currently applied DNA markers and the technique associated with their analysis have changed significantly from those of the original DNA fingerprint. The digital nature of today's DNA tag determination has enabled the application of powerful DNA registers in crime investigations. Application of DNA tags has expanded from paternity, crime and cadaver identification to the prediction of external features such as hair or eye color in criminal investigation. In the early 1990's pioneering work on PCR-based DNA identification was carried out in Finland.