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Edmond Locard
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Transcript
In forensic science, Locard's exchange principle (sometimes simply Locard's principle) holds that the perpetrator of a crime will bring something into the crime scene and leave with something from it, and that both can be used as forensic evidence.
- Locard is also renowned for his contribution to the improvement of dactylography, an area of study which deals with fingerprints.
- After the laboratory in Lyon was established, he developed the science of poroscopy, the study of fingerprint pores and the impressions produced by these pores.
- He went on to write that if 12 specific points were identical between two fingerprints, it would be sufficient for positive identification.
- This work led to the use of fingerprints in identifying criminals being adopted over Bertillon’s earlier technique of anthropometry.
How do we use his contribution today?
How did he contribute to forensics science
- Trace evidence, that was his main purpose which can be used to link people or objects to places, other people or other objects, and often serves as a starting point, or lead, for a particular line of investigation.
- Trace investigators must stay abreast of advances in manufacturing techniques, materials, coatings and processes.
- Every item that can be touched or transported has the potential to become trace evidence
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Edmond Locard
Biography
- Dr. Edmond Locard was a pioneer in forensic science
- Born on December 13, 1877
- Died May 4,1966
- 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.
What was his exchange principle about?
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