Traces of Justice review – ‘Chinese Sherlock Holmes’ at centre of arresting forensic cop thriller

Based on real scientist Cui Daozhi, this sharp feature has thumping set pieces and knotty puzzles set across 30 years of gripping cases

The latest from Chen Sicheng, prime mover behind the hit Detective Chinatown franchise, offers a disarming mix of propaganda, copaganda and gripping narrative. It’s essentially a portmanteau biopic: its hero is Cui Xun, a fictional stand-in for the venerable Cui Daozhi, a still-extant real-life figure who so revolutionised forensic science he became known as “China’s Sherlock Holmes”. Ripping three-and-a-bit tales from the casebook – involving a 1970s child killer, a grisly 1980s multiple murder and a 1990s bus bombing (plus one lingering loose end), Chen constructs a history of forensic investigation that is also, in variably oblique ways, a history of Chinese law enforcement, which is shown evolving from boozy, gloveless crime-scene trampling to something far more streamlined and professional.

Within the handsome period framework, Chen follows the science: one era’s crazy innovation becomes commonplace in the next. A rookie Cui (played here by Zhang Yi, ageing up subtly) uses boiled potatoes to take dental imprints; when these run out, he and his colleagues start biting one another’s cheeks to make their points. (Their scars are a terrific visual gag: scientists literally showing their working.) By the 90s, when Cui is heading a team working out of a vast, well-staffed warehouse, we seem mere moments away from David Caruso’s sunglasses and memorable Who guitar riffs. The forbidding subtext is presumably that, after 50 years of such breakthroughs, there’s no more getting away with it; as one suspect insists: “everyone pays for what they’ve done.”

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