... in a court of law. Third, the movement from retaining samples as evidence into creating a computerized data banking systems will be explored and the policies it has affected in most large U.S. cities and countries across the globe. Finally this paper will explore the criticism of the data banking systems from civil rights groups, convicted felons and politicians. Blood Typing Systems In the late 19th century Karl Landsteiner discovered that human blood could be distinguished into four main groups using the Antibody/Antigen interactions: Groups A, B, AB, and O. There are two antigens and two antibodies that are responsible for the ABO types. The specific combination of these four components determines an individual's type. A blood test is used to determine whether A, B and/or O characteristics are present in a blood sample, and though it is not possible to determine the exact genotype from a blood test the results ...

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