Brittany Morris

They said that there was nothing that links this family to the crime.

So it was a Wednesday, and she wasn't answering her phone.

She wasn't responding to text messages.

This was very unlike her.

So that afternoon, Allison Feldman's boyfriend decided to go check on her.

He let himself into her house and found Allison lying in a pool of blood.

We later learned that she had been sexually assaulted and died from asphyxiation and blunt force trauma to the head.

It stumped them because Allison was loved by everyone that knew her.

By all accounts from friends and family, she did not have any known enemies.

So according to the probable cause affidavit, there were at least three separate sets of DNA found at the crime scene.

There was Allison's DNA, her boyfriend's DNA, and one unknown DNA sample.

And investigators told me that they ruled this boyfriend out as a suspect, but that did not happen immediately and decided to turn their attention to making an identification for that unknown DNA.

No match.

So, years into their investigation, police submitted that unknown DNA for what they call a familial test.

At that time, it was a very new technique, and it was only being used in 12 other states.

Listeners might be wondering if it's the same technology as genetic genealogy.

It's a little different than that.

Familial testing involves running DNA samples through government databases.

So people who are already known to law enforcement.

Genetic genealogy involves running those DNA samples through private databases.