Bertillon developed a system of identification via body measurements that was designed to identify whether crime suspects had an existing criminal history. But his contributions to police work have been occluded by some terrible missteps. 
Research: 

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Hoobler, Thomas and Dorothy. “The Crimes of Paris: A True Story of Murder, Theft, and Detection.” Little, Brown, and Co. 2009.
Levendowski, Amanda, “Face Surveillance Was Always Flawed.” Public Books. Nov. 30, 2021. https://www.publicbooks.org/face-surveillance-was-always-flawed/
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Wang, Hansi Lo. “Meet Alphonse Bertillon, The Man Behind The Modern Mug Shot.” NPR. March 8, 2016. https://www.npr.org/2016/03/08/469174753/meet-alphonse-bertillon-the-man-behind-the-modern-mug-shot
Daniel V. The Social History of Disaster Victim Identification in the United States, 1865 to 1950. Acad Forensic Pathol. 2020 Mar;10(1):4-15. doi: 10.1177/1925362120941336
Helfand, Jessica. “Alphonse Bertillon and the Troubling Pursuit of Human Metrics.” The MIT Press Reader. May 5. 2021. https://thereader.mitpress.mit.edu/the-troubling-pursuit-of-human-metrics/
“Alphonse Bertillon (1853-1914).” National Library of Medicine. Visible Proofs: Forensic Views of the Body. https://www.nlm.nih.gov/exhibition/visibleproofs/galleries/biographies/bertillon.html
Farebrother, R. and Champkin, J. (2014), Alphonse Bertillon and the measure of man: More expert than Sherlock Holmes. Significance, 11: 36-39. https://doi.org/10.1111/j.1740-9713.2014.00739.x
Guthrie, Glenice J., and Sharon Jenkins. “Bertillon Files: An Untapped Source of Nineteenth-Century Human Height Data.” Journal of Anthropological Research, vol. 61, no. 2, 2005, pp. 201–15. JSTOR, http://www.jstor.org/stable/3630855
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