The Ripper killings stopped after Druitt's death

The argument

One of the most puzzling features of the Jack the Ripper case is how it ended. The killings stopped abruptly after November 1888, even though the murderer was never identified or arrested. That combination is what any candidate for the Ripper's identity has to account for: a series of murders committed with apparent freedom, and then nothing, with no arrest, no trial and no apparent reason for the killer to have stopped. One explanation requires no further evidence about the crimes themselves. If the Ripper had died around that time, his death would explain why the murders ceased. Death removes the need to suppose that a man who had killed repeatedly simply chose to stop and was never heard from again. Montague John Druitt is the candidate offered on those grounds. In December 1888 Druitt took his own life. He was rumoured to have suffered from hereditary mental health problems, and he ended his life following his dismissal from a school in Blackheath, where he had worked as an assistant schoolmaster. His decomposing body was recovered from the River Thames on 31 December. The argument rests on the timing. Druitt's suicide came shortly after the last of the murders, placing his death in exactly the window that the end of the killings requires. The circumstances add to the case: a man in evident crisis, dismissed from his post and rumoured to be affected by inherited mental illness, who killed himself within weeks of the final murder. What this offers is an answer to the question the case leaves hardest — not who had the opportunity, but why the killing stopped when it did. The timing of Druitt's suicide provides that answer, and because the Ripper killings stopped after Druitt's death, the argument concludes that Jack the Ripper was Montague John Druitt.

Premises

Counter-arguments

Critics argue that 'the murders stopped after Druitt died' is weak circumstantial reasoning that fits many suspects. Serial killers cease for numerous reasons unrelated to death — imprisonment for other offences, institutionalisation, illness, relocation or simply stopping — so a halt in killings around late 1888 does not point specifically to Druitt, and even the count of 'the last murder' is disputed, since some researchers attribute later killings to the Ripper, which would place murders after Druitt's suicide. They add that the timing is coincidental rather than evidential: no physical evidence, eyewitness identification or confession links Druitt to any of the crimes, and the case for him rests largely on a later, second-hand memorandum by a senior policeman whose reliability is contested. On this view the suicide's proximity to the killings is suggestive at most, and the same 'stopped after his death' logic has been used to nominate other suspects who died or were confined around the same period, so it cannot establish that Druitt was the Ripper.

Rejecting the premises

[Rejecting P2] Critics note serial killers stop for many reasons other than death — arrest, confinement, illness, relocation — so a cessation of murders does not specifically indicate the killer had died. [Rejecting P3] Druitt's suicide near the last canonical murder is coincidental; no physical evidence, identification or confession ties him to the crimes, and the case rests on a contested second-hand memorandum, so the timing does not establish his guilt.