DNA forensic has never been this simple. If crime scene DNA has not marched genetic profiles of known offenders and arrestees, then FGG can be used.
The scientific development of forensic genetic genealogy (FGG) which couples genetic analysis with investigations of publicly available genealogy information has successfully transformed investigations.
Use of FGG involves database and family trees composed of genetic data of private citizens who are not under any suspicion for any crimes.
When searching crime scene DNA in these databases, potential perpetrators may be uncovered by identity of their close or distant relatives.