Of course I agree with you that you can't do anything if your DNA isn't in the system. The single biggest thing to make an impact on crime was DNA. GPS has made somewhat of a dent because it now gives you an area to look in a lot of cases.
If a perp's DNA is not in the FBI VICAP database, it may take years or even decades for their identification. One of the latest crime fighting tools/investigative resources that has shortened this ID time is Familial DNA/Laws.
(CA)Grim Sleeper Awakens Attention to Familial Searching of DNA Databases. ... that belonging to the son of the man now identified as the Grim Sleeper..
Grim Sleeper Awakens Attention to Familial Searching of DNA Databases
Posted by James Cass on July 13, 2010
Last week, the Los Angeles Police Department announced that it had captured a man suspected of being the “Grim Sleeper”: a serial killer linked with at least 10 murders over 25 years. The case marks the first time in the United States that a DNA search technique known as familial searching has led to an arrest in a homicide case.
As we’ve previously discussed, a partial match between two DNA profiles may indicate that the donors of the corresponding samples may be related. In familial searching, a database is searched for the purpose of identifying partial, rather than exact, matches against the sample of unknown origin. Those partial matches are then used as investigatory leads.
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