DNA analysis has become widely accepted in most legal systems and has an irreplaceable role in forensics. By using precisely this method numerous forensic cases have been elucidated. During the trial for the crime in which DNA evidence is considered, it is not sucient that the prole of the event and the prole of the suspect make a match. It is necessary to bring the value of that evidence to determine if the evidence is reliable and useful. While considering the value of evidence it is necessary to pay attention to several things. We should take into consideration whether it is a specic subpopulation or the general population. The value of the evidence is greater if we ignore the fact that the suspect and oender belong to a specic subpopulation. An even greater impact on the value of the evidence has the fact that the suspect has a relative. By ignoring that fact, the value of the evidence is unfairly presented in favour of the prosecution. While analysing mixed traces, we also must pay attention to which population do contri- butors in the mixture belong: whether they belong to the general population or some specic subpopulation. If it is in some specic subpopulation, the value of the evidence reduces. Only after considering all the facts evidence can validly be presented in court. 25