Compare modern-day forensic techniques with was in use in the Jack The Ripper years (1888-1891) may seem absurd, at the limit of parodistic. Even for those who are less than competent about this matter, the technological comparison is totally unequal. 130 years of progress are a lot, but it would be profoundly wrong to assimilate the late nineteenth century to a kind of stone age, where the criminal investigation took place only based on the intuition of the investigators and the testimonies. Similarly, it would be wrong to think that current technology is the necessary and sufficient condition to solve any crime, including serial killings. Just read a newspaper to realize it.