a decimal point. Probability of Identity The probability of identify (also known as the random match probability) is the probability that two individuals selected at random will have an identical genetic profile. Applied Biosystems estimates the probability of identity for SGM Plus to be approximately 1 in 13 trillion for African-Americans and 1 in 3.3 trillion Caucasian Americans. The Human Genetics Commission has reported that the random match probability is in the region of 1 in a trillion. However it stated "When the SGM Plus profiling system was first introduced, there was agreement within the scientific community that identifications with match probabilities lower than one in a billion would not be quoted in the courts of law, so as to avoid overstating the value of the DNA evidence to take into account that match probabilities are only estimates, and to make sure that the figure used was one that was meaningful to non-specialists." The UK Crown Prosecution Service states "SGM Plus DNA profiling is very discriminating between individuals. The probability of obtaining a match between the profiles of two unrelated individuals by chance is very low, of the order of 1 in a billion. However, it has not yet been possible to carry out the required statistical testing to be able to quote this match probability, and in practice a more conservative chance match figure of 1 in 1,000 million is used." See also DNA profiling National DNA database References External links Short Tandem Repeat DNA Internet DataBase AmpFlSTR SGM Plus PCR Amplification Kit User's Manual Applied genetics Biometrics DNA profiling techniques Genetics in the United Kingdom Identity documents of the United Kingdom Law enforcement in the United Kingdom