[Attempted fraud in legal identity determination--detection by DNA single locus analysis].

In a case where a mix up of blood samples was claimed, an identity check was carried out by means of four single-locus-probes. DNA analysis produced identical profiles with two of the probes (MS 31 and MS 43). With the two other probes one matching and one differing fragment could be detected respectively (MS 1 and g3) In addition to the unambiguous statement "no identy", the DNA analysis proved that the tested blood samples must have been those of two closely related people, most probably of brothers and sisters. Attempted fraud can be assumed from these findings. Further investigations and additional DNA analysis which included a blood sample of the brother of the accused, revealed that the sample for the identity check had been taken from the brother and not from the accused himself.