Some guy k****d a bunch of people, obviously, and got away with it. (Golden State Killer, aka the Original Night Stalker, aka the East Area R**ist and aka the Visalia Ransacker)

Then like 20 years later all those DNA companies start up.

So does he get one done?

No.

But the police have his DNA in evidence but no matches on their forensic databases. So they get access to the databases of these companies and look for anyone with a close match and they find one. How close the match is says that this person is a 5th cousin of the serial killer. So they go through birth records and find everyone who is a 5th cousin to this person. They then eliminate all of those who are too young, wrong s*x, etc. This narrows it down to one.

So some guy gets arrested, charged and convicted of crimes he thought he got away with decades earlier because a 5th cousin he didn't even known existed wanted to know if he was part Viking or something.

Kinda a silly one.

When I was in middle school I was visiting my BFF out of town and her and her entire family took a trip to see other family and I tagged along. After a 9 hour drive we get to the motel and there is like 4 adults and us three kids in the room and I laid on the bed by the wall and was resting my eyes and thought “how funny would it be to pretend I fell asleep and roll off between the bed and wall” which I did. Adults start freaking out and trying to help my out, my friend and her sister are in hysterics laughing. It became the story told over and over again the rest of the trip and still comes up to this day almost 30 years later. I’ll never admit it was a ruse and take that joy it brings them away.