mples and fluid stains; they are thought to originate from the crimes' perpetrators. The tool has already proven quite useful. As less blood grouping is carried out, British authorities believe that the DNA Index will eventually replace their previous "Blood Group Index" (Davies 96).
Deoxyribonucleic acid profiling may be defined as the molecular analysis of an individual's genetic material. It has been estimated that molecular variation occurs within the human genome at a frequency ranging from 1 in 100 to 1 in every 1,000 nucleotides. This abundant polymorphism is responsible for the genome's individuality; it is the reason that DNA analyses are so very useful for identification purposes. Typically, identity testing involves profile comparisons. Forensic scientists try to determine the degree of similarity or disimilarity between the suspect's DNA and samples obtained from the victim. Should a match be found, then the "weight of the evidence relies on the distribution of the genotypes in the population in question (Sajantila and Budowle 637-638)." From known genotype frequencies in the appropriate populations, it is possible to calculate the probability of the same DNA profile coming from another random, unrelated person. The true precision of DNA analyses
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