Dr. Stephen Donoghue:

With STRs, one can do something called familial profiling. It is mentioned in this Bill. It is a standard enough practice. It is really based on statistics where there is not an exact match and one is looking for a best-fit match in terms of the number of hits with regard to the profile. It is a standard enough practice, if there is not an exact match, to look for a familial match. There have been many famous such cases in the United States. The Senator might have heard of gruesome serial murderers who have been caught using familial profiling whereby the authorities compare with sons or relatives. It is usually a first-order relative who is required for that kind of STR profiling.