Jack Ripper and case of missing DNA evidence

The most compelling suspect in recent years is Aaron Kosminski, a Polish immigrant who lived in Whitechapel during the time ...
DNA analysis concluded that Aaron Kosminski, a Polish immigrant, was the notorious serial killer known as Jack the Ripper.
The brutal murders by Jack the Ripper had terrorised the murky slums of the Whitechapel district in east London in the autumn ...