Advances in fingerprint technology by Henry C Lee; R E Gaensslen

Forensic Science

By Henry C Lee; R E Gaensslen

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Each type of characteristic is weighed according to a purported order of frequency, and weights are also assigned to cells without a characteristic. Determination of identity is made by the total value of the weighed characteristics found in a given area. No agency has officially adopted this method for establishing the identity of latent prints. Its application in latent print comparisons is entirely theoretical at this time. 4 Osterburg grid method. 12,13 A microscope is used to view the latent and inked prints at magnifications between 10× and 25×.

3 Forensic scientists who fail to understand the scientific methodology involved in their 0923Ch02Frame Page 45 Monday, May 14, 2001 1:31 PM work will quite often fare badly under rigorous cross-examination when defending their findings in a court of law. Individualization is unique to forensic science; it refers to the demonstration that a particular sample is unique, even among members of the same class. It may also refer to the demonstration that a questioned piece of physical evidence and a similar known sample have a common origin.

It must also be remembered that missing or bandaged digits have to be further searched to cover all possibilities. Some examples of the Henry system classification are shown in the following table. 0923Ch01Frame Page 25 Monday, May 14, 2001 1:34 PM Sir Edward Henry and Sir William Herschel In England, an “Establishment” controversy has existed since the end of the nineteenth century concerning the merits of British fingerprint pioneers. 12) also worked out classification systems, and these knights, with Sir Edward predominating, were considered to be very nice chaps.

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