"Police had found no exact match between DNA found at the crime scenes and any of the profiles in California's DNA profile database, so they searched the database for stored profiles that demonstrated sufficient similarity to allow police to infer a familial relationship. They found similar DNA belonging to Franklin's son, Christopher, who had been convicted of a felony weapons charge in 2008. Christopher was too young to have committed the murders, but the familial DNA match led investigators to look at his father, Lonnie, as the likely perpetrator."
its a little fraught, because some states take DNA from those who have committed crimes..
https://en.wikipedia.org/wiki/Frederick_Bieber#National_and_...
Family Search first used in California in 2010. The "Grim Sleeper" serial murderer. They first tried in 2008 but no match. Trying again 2010 yeilded a result. https://en.wikipedia.org/wiki/Grim_Sleeper#Arrest_and_furthe...
"Police had found no exact match between DNA found at the crime scenes and any of the profiles in California's DNA profile database, so they searched the database for stored profiles that demonstrated sufficient similarity to allow police to infer a familial relationship. They found similar DNA belonging to Franklin's son, Christopher, who had been convicted of a felony weapons charge in 2008. Christopher was too young to have committed the murders, but the familial DNA match led investigators to look at his father, Lonnie, as the likely perpetrator."
its a little fraught, because some states take DNA from those who have committed crimes..