JACK THE RIPPER
| PERIOD | August 31 – November 9, 1888 (the canonical five) |
| LOCATION | Whitechapel and Spitalfields, East End of London |
| VICTIMS | Nichols, Chapman, Stride, Eddowes, Kelly — with a wider Whitechapel file of eleven |
| STATUS | Never identified; the oldest open file in the drawer |
THE CLAIM
That a single unidentified man murdered and mutilated at least five women in a few square miles of Victorian London over ten weeks, wrote taunting letters signed with the most famous alias in criminal history, and vanished. Roughly half of that is well supported. The letters, notably, are probably not his.
WHAT IS KNOWN
Between late August and early November 1888, five women — Mary Ann Nichols, Annie Chapman, Elizabeth Stride, Catherine Eddowes, and Mary Jane Kelly — were killed in and around Whitechapel, most with escalating post-mortem mutilation that suggested one hand. These are the "canonical five," a grouping most, though not all, researchers accept; the Metropolitan Police's broader Whitechapel murders file ran to eleven deaths between 1888 and 1891. Despite an enormous investigation — house-to-house canvasses, dozens of arrests, a witness description or two of a man of unremarkable appearance — no one was ever charged.
The name came from a letter. The "Dear Boss" letter of September 1888, signed "Jack the Ripper," and the "Saucy Jacky" postcard that followed were suspected by senior police officials at the time — and by most historians since — of being the work of an enterprising journalist drumming up copy; hundreds of imitation letters followed. Only the "From Hell" letter, posted to a local vigilance committee with half a preserved human kidney, retains any serious claim to authenticity, and even that is disputed. It is entirely possible the killer never wrote a word.
What survives is thin: inquest records, some police memoranda naming late-period suspicions (Kosminski, Druitt, Ostrog appear in an 1894 memorandum), and a case file thinned by loss and souvenir-hunting over 130 years. Onto that thin record a "suspect industry" has built more than a hundred named candidates, from Polish barbers to royal physicians to the painter Walter Sickert — most demonstrably impossible, none provable.
LEADING THEORIES
- Aaron Kosminski. A Polish-born Whitechapel resident named in contemporary police memoranda and committed to an asylum in 1891. A 2019 peer-reviewed paper matched mitochondrial DNA from a shawl allegedly found with Eddowes to descendants of Kosminski's line. Critics answered on every front: the shawl has no documented connection to the crime scene, it was handled for a century, and mitochondrial DNA excludes rather than identifies — the matched type is shared by thousands. The claim persuaded headline writers, not geneticists.
- Montague Druitt. A barrister who drowned himself weeks after the Kelly murder, named in the same 1894 memorandum. The timing is suggestive; the evidence connecting him to Whitechapel is essentially nil.
- A local nobody. The unglamorous consensus of modern profilers: a resident of the district, socially invisible, who stopped because he died, was institutionalized, or was jailed for something else — and was never in any file at all.
- No single Ripper. A minority of researchers argue the canonical five conceal two or more killers, with Stride in particular a frequent candidate for removal from the series.
ASSESSMENT
This case will never close, and the OSA says so without regret: the evidence needed to close it stopped existing decades ago. What remains is a mirror — each era convicts the suspect it finds most interesting, which is how a squalid series of murders of poor women acquired royal conspiracies and celebrity culprits. The five women are the facts of the case. Everything wearing a top hat is marketing.