The issue with fingerprinting, when last I read about it (several years ago), was that there has been very little controlled study of just how accurate it is. A

The issue with fingerprinting, when last I read about it (several years ago), was that there has been very little controlled study of just how accurate it is. Apparently the (US) professional society of fingerprint analysts forbids its members from taking part in research on accuracy, maintaining that when done correctly it's 100% accurate, full stop.