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Alvarez had studied the work of his colleague Juan Vucetich, head of the bureau of statistics for the La Plata police. Vucetich had discovered a method of analyzing and classifying fingerprints that made them easy both to file and, equally vital, to retrieve. Until then, the police authorities had largely ignored his work. But because of the Rojas case and subsequent successes, Argentina adopted fingerprinting as its sole method of identifying criminals – the first country in the world to do so.

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All of them use things that you can get at home!

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Describes uses of forensic chemistry.

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This article describes what DNA is, how it is collected and tested under forensic situations, and how the information is presented and used in court. It is a relatively easy-to-understand format for lay people.