Edmond Locard

French forensic scientist (1877-1966) · France · On the map · Writers · Died at 88

Edmond Locard was a French criminologist, the pioneer in forensic science who became known as the "Sherlock Holmes of France". He formulated the basic principle of forensic science: "Every contact leaves a trace". This became known as Locard's exchange principle.

Edmond Locard is read about 100 times a day, in 25 languages.

A typical day, 30 days to 6 November 2026

The middle day of the days counted, so one week of news cannot move it. The line under it is the last 104 days, one point a day.

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