Well the government is not doing that in this case. They don't care about phenotypes for this analysis. The phenotypes are used for other analysis like public health efforts, but for law enforcement they just ask whether one pattern matches another and to what proportion it matches, and then if it matches a psuedorelative they go about to see if there is infact a person who could be this psuedorelative, then they go about and see if the person did commit the crime with other pieces of evidence.