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Jack the Ripper was never identified. Here are all the clues that we think indicate Aaron Kosminski could have been the serial murderer Jack the Ripper.

A killer barber? All the evidence Aaron Kosminski was Jack the Ripper

Jack the Ripper is the infamous prostitute killer of the Whitechapel District of London. He was only confirmed to have killed five women, but like most uncaught serial killers, he was suspected of having killed more. 

The general consensus is that Jack the Ripper was never identified. Some people insist that there was indeed a man who clearly fit the crimes of Jack the Ripper. The chief constable of Scotland Yard at the time of the Jack the Ripper murders was Melville Macnaghten. Macnaghten named three people as chief Ripper suspects: M. J. Druitt, Michael Ostrog, and Aaron Kosminski. 

Aaron Kosminski is our particular target of interest. There are a host of things linking him to the Jack the Ripper murders. Too many to simply be dismissed as probable coincidences. Here are all the clues that we think indicate Aaron Kosminski could have been the serial murderer Jack the Ripper

The murders stopped soon after Aaron Kosminski was institutionalized

Aaron Kosminski was not a stable man. In 1891, he was sent to Colney Hatch Asylum. Psychiatric reports made during Kosminski’s time there state that Kosminski heard auditory hallucinations that directed him to do things. Although some claim that Kosminski wasn’t violent, there is a record of him threatening his own sister with a knife. 

The “canonical five” murders which wrapped up the sum of the Ripper’s official kills, stopped soon after Kosminski was put into an asylum. Present-day doctors think Kosminski might have been a paranoid schizophrenic, but it sure is suspicious that his institutionalization fits the timeline of Jack the Ripper

Aaron Kosminski hated women 

Did we mention Kosminski threatened his sister with a knife? Jack the Ripper is infamous for the violent way in which he murdered his female victims. This serial killer did things like slashing throats, removing organs, and severely disfiguring faces. The crimes he committed were grisly and suggested a severe hatred of women. 

Kosminski definitely fit the description of hating women. He was terrible at socializing with women and according to Chief Constable Melville Macnaghten, he was known for his profound resentment of women. 

Macnaghten wrote in a note, “This man became insane owing to many years indulgence in solitary vices. He had a great hatred of women, especially of the prostitute class, & had strong homicidal tendencies.” 

Hating prostitutes and suspected as being capable of murder? Kosminski is looking better and better as the chief Jack the Ripper suspect. 

Aaron Kosminski had an accent & fit the Ripper’s physical description

The night of one of the murders, a woman named Elizabeth Long said she heard the voice of the man who led Jack the Ripper victim, Annie Chapman, to her death. Long said she heard the man ask Annie, “Will you?” as they were discussing their sex work arrangement. Long described the man’s voice as having an accent. 

Kosminski, as a Polish Jew, had an accent. Not to mention, a clue left on a Goulston Street wall in London suggested that Jack the Ripper had a native language other than English as well. The person who wrote the message spelled the word “Juwes” instead of “Jews”. The entire message read, “The Juwes are the men that will not be blamed for nothing.” It was never understood what was actually meant by it. 

What’s more, Macnaghten wrote this about a suspect spotted fleeing on the night of Catherine Eddowes’ murder: “This man in appearance strongly resembled the individual seen by the City PC near Mitre Square.” 

Care to take a guess as to who “the individual seen by the City PC” Macnaughten referred to was? That’s right. He was talking about Aaron Kosminski! Although reports of Jack the Ripper’s appearance, in general, were inconsistent, Kosminski fit the appearance of someone spotted by one of the crime scenes. Macnaghten’s report has been discredited though, so take this with a grain of salt. 

The most convincing evidence of all: DNA evidence 

In 2007, a man named Russel Edwards wanted to confirm the identity of Jack the Ripper so badly that he acquired the shawl of Jack the Ripper victim Catherine Eddowes. He had the shawl DNA tested and confirmed that genetic material on the shawl traced back to one of Kosminski’s living relatives. 

Edwards had written a book entitled, Naming Jack the Ripper, and thus had something to gain, so people didn’t believe this analysis. That is, until the DNA was studied by an unrelated peer-reviewed science journal. In 2019, The Journal of Forensic Sciences confirmed that the DNA did indeed match Aaron Kosminski. 

Does that seal the deal on the proof that Aaron Kosminski was Jack the Ripper for you? Check out the 2016 thriller movie Jack the Ripper and 1979 mystery movie Murder By Decree while you deliberate.

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  • There are more than a few plot holes in this article and in Edwards’ dreadful egotistical self-indulgent book which I threw out after one chapter it was so terrible.

    Macnaughton makes no mention of the night of Catherine Eddowes in his memorandum on Kosmisnki. There is not even a mention of Eddowes in Anderson’s memoirs or Swanson annotations on page 138 of those memoirs. Plus the other two suspects on the Macnaughton list Ostrog and Druitt have been completely discredited,. Macnaughton wrote that Druitt was a doctor when in fact he was a barrister and a teacher. Ostrog was in Paris at the time of the murders. So why should Kosminski be any more credible on the memorandum?

    The list of Catherine Eddowes’s clothing by Inspector Edward Collard is as follows:
    Black straw bonnet
    Black cloth jacket
    Chintz skirt
    Brown Linsey dress bodice
    Grey stuff petticoat
    Very old green alpaca skirt
    Very old ragged blue skirt
    White calico chemise
    Mans white vest
    No drawers or stays
    Pair of Mens lace up boots
    1 piece of red gauze silk
    1 large white handkerchief
    2 unbleached calico pockets
    1 blue stripe bed ticking pocket
    1 white cotton pocket handkerchief
    1 pair of brown ribbed stockings
    12 pieces of white rag
    1 piece of white coarse linen
    1 piece of blue and white shirting
    2 small blue bed ticking bags
    2 short clay pipes
    1 tin box of tea
    1 sugar
    1 piece of flannel and 6 pieces of soap
    1 small tooth comb
    1 white handle table knife and 1 metal teaspoon
    1 red leather cigarette case
    1 tin match box
    1 piece of red flannel
    1 ball of hemp
    1 piece of old white apron

    Guess what? No shawl.

    The story of how Simpson allegedly stole this mysterious ‘shawl’ is pathetic at best. Edwards claiming he wanted it to give his wife because it was chilly. Out of everything that could have been stolen only the shawl goes missing and is conveniently put on auction? This story is not for sale.

    Not so sealed now.

    June 3, 2020
  • If a true Ripperologist, not some yuppie amateur, could find evidence as to Kosminski’s actual whereabouts on the night of the Double Event, whether he was at home, work [as a hairdresser], prison or the asylum, to blow this whole theory out of the water, I would be so grateful.

    June 4, 2020
    • I have read credibly tht kosminski hadnt workd 4 sev. Previous years…he was too mentally ill 2 hold down any knd f a job!!!!!

      October 13, 2020
  • The only Polish Jew mentioned by the newspapers in 1888 was Joseph Isaacs. Anderson did not mentioned his suspect by name and McNaughton’s memorandum has already been discredited.
    PS Has anyone actually checked if the story of the shawl is actually true? There are such things as family legends. Amos Simpson’s descendants could have just made the whole thing up.

    June 13, 2020
    • Thank you, we have remedied this error.

      June 24, 2020
  • Even if there was DNA contact between Kosminski and Eddowes it proves nothing other than contact. As customers. Kosminski could have been a client of Eddowes. Eddowes could have been a customer of Kosminski, he was a hairdresser after all.
    Plus there is no circumstantial evidence for Kosminski for the night of the double event or any other Ripper murder. So even if Kosminski did kill Eddowes that does not tie him to the other killings of Stride, Chapman, Nichols or Kelly (if they were even Ripper killings at all).
    There is also no evidence of violence in Kosminski (though there was in Nathan KAMINSKY) except for threatening his sister with a knife and throwing a chair at an orderly

    June 13, 2020

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