[syhprum (OP)]

With the growth of reading ability amongst the masses and the development of cheap printing stories of raped virgins and murdered prostitutes became very popular.
In the eighteen eighties a series of murders of six women and their mutilation were linked together by the press and in popular imagination and attributed to one man who was nicked named "Jack the Ripper", this series of murders ceased and numerous efforts were made to identify him without  success ,these efforts continue to the present day with no success although the most modern forensic techniques have been employed.   

[Bored chemist]

a series of murders of six women and their mutilation were linked together by the press and in popular imagination...

..and by the police who were in a position to look at the modus operandi (Including the facts that were kept from the press at the time).


"Was "Jack the Ripper" a real person... ?"
Yes.

The alternative is to hypothesise that a number of murderers with very similar behaviour were at large and working at the same time in London (but not other cities) and who all started and stopped - presumably independently- at the same time as each other.

"the most modern forensic techniques have been employed."
Really?
How?
Did they use time travel?

[RD]

"the most modern forensic techniques have been employed."
Really?
How? ...

Allegedly his DNA ... https://www.bbc.co.uk/programmes/p0266rf0

[Bored chemist]

"the most modern forensic techniques have been employed."
Really?
How? ...

Allegedly his DNA ... https://www.bbc.co.uk/programmes/p0266rf0

Inadmissible.
People handled the items for  a hundred years .
You can't rule out cross contamination.
That's what I meant.

the most modern forensic techniques

means following proper protocol, and they didn't.