Milo;381097 wroteLots of things to question about his theory . . .
Ripper never had sex with his victims, so of what relevance is a semen sample found on the property of a prostitute?
Said property was not exactly stored in an evidence bag for the last century, was it?
Lets just wait and see if the studies and tests hold up to peer review. If they do, then I will be just as excited as anyone at what "might" be the investigative breakthrough of the century.
You assume the shawl was Eddowes'. The article distinctly says that she was unlikely to own it since it was expensive, as she pawned her shoes the day before the murder.
I say that it was perhaps Kosinski's sister's (it was made in Eastern Europe where they were from) and he used it as a gift to lure the victim (similar to what was speculated about the grapes).
What is certain is he was seriously mentally ill, probably a paranoid schizophrenic who suffered auditory hallucinations and described as a misogynist prone to ‘self-abuse’ – a euphemism for masturbation.
In other words, he was the type of person who got sexually aroused when he killed his victims. Not unheard of in modern times.
He masturbated after/during killing the victim.
To address your second point. They extract dna from bones thousands of years old. It is not inconceivable, with modern techniques, to extract dna from something only 130 years old.
Do I really have to connect ALL the dots? I just posted the article because it was interesting.