In this segment of Secrets of Scotland Yard, learn about the further development of investigative techniques of Scotland Yard. Since the turn of the century, the Yard had been working on the practical application of the greatest leap forward in criminal detection: fingerprinting. Scotland Yard figured out how to best exploit the fact that no two fingerprints were the same to help solve crimes and were pioneers in using fingerprints as a prime detection method. The trial of the Stratton Brothers was the first in which the Yard was able to use their new method to convict the suspects of murder. In 1963, it was fingerprinting that also convicted the gang behind Britain's most famous crime: the Great Train Robbery.