And then that person fled.

If my dad was having an affair, he's not the kind of person to, like...

He wouldn't, like, get possessive kind of guy at all.

I mean, he would've been fine, but he wouldn't have, like, gone berserk, I can tell you that much.

I can't imagine my father, like, I just, he's, I just can't imagine him, like, actually, like, murdering her and staring at her face, like, while she died in his hands.

That just totally seems unfathomable to me.

I knew my dad loved my mom so much.

If Sandy Preuer didn't kill his wife, then who did? Detectives need a new strategy, and that unknown blood found at the scene just might give them one.

He never got closure, and Lauren thought she might not eitherBut when we spoke, Lauren told me there came a moment sometime in the years after her father died where she felt like she might finally be able to make peace with everything that had happened.

If I have to accept this, then I have to, 'cause my parents are together, and I can't live the rest of my life, every single day, in pain and in fear and scared and sad.

That's not the right path.

The right path is, it happens, and you have to give yourself grace, but you can't live every single day with terror and fear and sadness.

You're never gonna get through.

She seemed like a, a wonderful, wonderful mom.

You have no idea.

She was my hope, my pride, my joy, my beauty.

Here's his daughter, Lauren Preer.

My father and my mom's family used to be so close, but my mom's family believed he killed her.

Not all of them.

Some of my uncles and some of my cousins were like, "There's no way." I mean, I think my dad died of a broken heart.

As the years passed, Lauren says she kept prodding police for updates in her mother's case.

I never gave up.

I never gave up.

I called all the time.

Here's his daughter, Lauren Prier.

My father and my mom's family used to be so close, but my mom's family believed he killed her.

Not all of them.

Some of my uncles and some of my cousins were like, "There's no way." I mean, I think my dad died of a broken heart.

As the years passed, Lauren says she kept prodding police for updates in her mother's case.

I never gave up.

I never gave up.

I called all the time.

The officers asked Sandy if the door was unlocked, and when he said it was, they entered.

I'm outside talking to Sandy.

I said, you know, "Could, is there something, you know, anything else that maybe she's, you don't know about?" Or, you know, just trying to figure this out.

And I d- asked him directly, I said, "Sandy, you were upstairs awfully quick.

Did you check everywhere?" And as soon as I said that, he puts his hand to his head and he goes, "Oh, I forgot to check the bathroom."

Mm-hmm.

He's like, "Lauren, your mom has been in an accident." I think I was thinking, like, a bus accident or she got in a car...

Like, you know, I wasn't thinking the wor- or that.

The truth revealed itself when Lauren saw a police car pull up in front of her apartment.

The police officer and my dad came up to our apartment.

It's okay.

It was all in slow motion.

He goes, "I'm so sorry." (cries) "Your mom is no longer with us here anymore."

Minutes after Eugene Gligore was arrested for the murder of Leslie Prier, Detective Augustin was on the phone to Lauren to break the news.

She asked me, "Do you know someone named Eugene Gligore?" And I- I lost it.

I used to date him.