Tools / Game Room · Forensics Game
🔬 The Trace Evidence Bureau
🕵️ A Sherlock Holmes tool — The consulting detective himself
Holmes practised forensic science before the world had a word for it — 140 tobacco ashes, the mud of every London borough, the worn R of a particular typewriter. The Bureau hands you a dossier of independent traces and a line-up of candidates. Each trace narrows the crowd; only one candidate survives every narrowing. Convict on convergence, never on a single clue — and learn why the suspect who fits three traces beautifully but contradicts the fourth walks free.
✅ Free to use — no account, nothing to configure.
What it does
Dossiers without end
AI-drawn trace sets — ash, soil, gait, fibre, ink — fresh every round.
Convergence, not hunches
Four candidates fit some of the traces; exactly one fits them all. The near-miss teaches the most.
Class versus individual
Every verdict explains which traces merely narrowed the crowd and which one picked the face from it.
How to use it
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1
Open a dossier: three or four independent traces from one scene.
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2
Test each candidate against every trace — one contradiction acquits.
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3
Name the survivor and hear the convergence spelled out.
Locard's exchange principle — every contact leaves a trace — was stated decades after Holmes lived by it. The Bureau trains the honest version: traces narrow; only convergence names.