Authorities have said the DNA tied former police officer Joseph James DeAngelo, 72, to most of the 12 killings he is accused of committing between 1976 and 1986 as part of the Golden State Killer case.
Investigators also allege DeAngelo raped more than 50 women during that period.
in the GSK case ( golden state killer ) iirc the cops had his DNA from a few of his many crimes, and simply sent it to "ancestry dnaDOTcom" or some such site, anonymously and discovered that he had relatives who had submitted DNA in search all the stuff the ads mention like your real ancestry.
These sites also tell people about relatives who have submitted DNA.
So, they got enough info from all the investigations and DNA to crack the case.
This was one of my objections to obamacare, a .gov website database with DNA is a recipe for eugenics genocide.
Unfortunately, we all have naive relatives no matter how well we guard our DNA being entered into databases.
In the case of GSK, that was hilarious... He almost got away with it - when he was a cop he resigned after being caught stealing rope and duct tape, and was soon forgotten about ... if he had been convicted and fired and there was a record, somebody might have gotten a clue that rope and tape is also a rape kit.
I can't recall who, but another serial killer was also caught the same way.
I think the cat is out of the bag with DNA - your idiot relative has already submitted theirs