Coincidentally, I was just yesterday reading that genetic complex is what finally matched up the Kansas BTK (bind, torture and kill) serial killer, several years ago.
The cops were on to him, but had no direct evidence. Guess what they did?
The daughter of the killer was a student at KU and had a routine pap. They took her genetic complexion and it matched her father’s.
The dead victims had his genetics under their finger nails. Boom, it was all over.
He’s in prison in El Dorado, Kansas, for 175 years, just on one count of the many others for murder.