On the evening of 21 December 1908, Marion Gilchrist — a wealthy woman of eighty-two — was beaten to death in her West Princes Street flat in the few minutes her maid was out for a newspaper; a diamond brooch was said to be missing. Her murder was never truly solved, and the first duty of this page is to say so: what follows is the story of what Glasgow did instead of solving it.
What it did was convict Oscar Slater. A German Jewish immigrant of raffish trade — gambler, dealer in jewels, a man living exactly the life Edwardian respectability distrusted — Slater had pawned a brooch (provably not the missing one, as police knew early) and sailed for America; extradited back, he was identified by witnesses whose sightings were fleeting, coached and contradictory. On evidence now taught as a catalogue of everything identification testimony can get wrong — salted with open prejudice about his origins and morals — the jury convicted by a majority in May 1909, and Slater was sentenced to hang. Reprieve came less than forty-eight hours before the scaffold; the sentence became penal servitude for life, and Slater disappeared into Peterhead’s granite for eighteen and a half years of stone-breaking.
The fight to free him consumed careers — most honourably that of Detective Lieutenant John Thomson Trench of the Glasgow police, who in 1914 gave documented evidence that the investigation had suppressed a witness’s naming of a different man: for this he was dismissed from the force and prosecuted on a contrived charge, his ruin a scandal inside the scandal. Arthur Conan Doyle, creator of the world’s most famous detective, took up the real-life case in 1912 and hammered at it for sixteen years, marshalling the evidence in print; a message smuggled out of Peterhead in a released prisoner’s mouth in 1925 relit the campaign’s final phase.
Vindication required inventing the machinery for it. Scotland had no court of criminal appeal until 1926 — the agitation over Slater’s case among the reasons one was created — and in July 1928 that new court quashed his conviction. Slater walked out after nearly two decades; compensation of £6,000 followed, grudgingly; he lived out his days quietly in Ayr, dying in 1948. Trench did not live to be righted; his rehabilitation has been posthumous and remains, many argue, incomplete.
The case endures as Scotland’s great miscarriage parable — prejudice plus certainty plus institutional self-protection — and as a working monument: every Scottish criminal appeal since 1926 walks through a door that Oscar Slater’s eighteen lost years helped force open. Marion Gilchrist’s killer, it must be said one last time, was never brought to justice.