It was recently reported that a scientist had proven through DNA that Jack the Ripper was Jewish. It is now being reported that the claim is false because it is based on an elementary but devasting error which renders the evaluations totally worthless.
The scientist who carried out the DNA analysis that identified Victorian-era serial killer "Jack the Ripper" as a Jewish barber named Aaron Kosminski has apparently made a fundamental error that fatally undermines his case, according to several top experts.
Scientist Jari Louhelainen is said to have put a decimal point in the
wrong place when using a mitochondrial DNA (mtDNA) database to
calculate the chances of a genetic match between DNA left on a shawl
that allegedly belonged to one of Ripper's victims, Catherine Eddowes,
and was supposedly discovered near her body, and DNA taken from
descendants of Eddowes and Kosminski.
The apparent error, first noticed by amateur criminologists in
Australia blogging on the casebook.org website, “has been highlighted by
four experts with intimate knowledge of DNA analysis – including
Professor Sir Alec Jeffreys, the inventor of genetic fingerprinting,”
according to The Independent.
Professor Walther Parson of the Institute of Legal Medicine in
Innsbruck has reportedly “echoed” Professor Jeffreys' concerns, as have
Mannis van Oven, professor of forensic molecular biology at Rotterdam's
Erasmus University, and Hansi Weissensteiner, also at Innsbruck and one
of the scientists behind the computer algorithm used by Dr Louhelainen
to search the mtDNA database.
Louhelainen used the database at the Institute of Legal
Medicine to match a DNA fragment from the shawl with Karen Miller, the
three-times great-granddaughter of Eddowes. Another DNA fragment was
matched to a descendant of Kosminski's sister who asked not to be
identified.
The error seems to have been made in the calculations linking Eddowes and Miller. If
the critics are right, Louhelainen's calculations were wrong and
virtually anyone could have left the DNA that he insisted came from
Eddowes. This means that Eddowes cannot be connected to the
shawl, and that therefore, no DNA connection can be made between
Kosminski and Eddowes.