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Debra Roberts
This is Debra Roberts here with another weekly episode of our latest true crime series from ABC and ABC Audio, Blood and Water. Remember, you can get new episodes early by following Blood and Water on Apple podcasts, Spotify, Amazon Music, or wherever you're listening right now. Here's the next episode of Blood and Water.
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Narrator / Stephanie Ramos
It was three weeks after his wife's murder that Sandy Preer told investigators she he was no longer going to talk to them.
Sandy Preer
My. My attorney said not to answer any more questions. And again, I don't mean to show any disrespect to you guys at all.
Narrator / Stephanie Ramos
Once Sandy said he was done talking, the detectives seemed to realize this could be their last chance to get what they wanted from him. They started pressing him to confess.
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Narrator / Stephanie Ramos
You got to.
Sandy Preer
I think I am. In fact, I know I am. And I'll just tell you one thing. You got the wrong guy.
Narrator / Stephanie Ramos
Sandy Preer was the wrong guy. But that only became clear much, much later, more than 23 years after Leslie Prier's murder, when police arrested someone else. New evidence had led police to this other man. And ultimately that evidence cleared Sandy Preyer of any wrongdoing. But until that arrest in 2024, Sandy remained, to a lot of people, the likely culprit. Here's his daughter, Lauren Preyer.
Lauren Preyer
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.
Narrator / Stephanie Ramos
Sandy Preyear did not live to see his name cleared. In 2017, he died suddenly after an illness. Lauren's friend Lisa says that he. The news was yet another gut punch for Lauren.
Lisa (Lauren's friend)
It came out of the blue. I mean, she just got a call one day from the ICU that her dad was there. And it was just so unbelievably traumatic for her, especially after losing her mom. You know, she was an only child, so I think then having her dad ripped away from her and it being so unexpected, it was just Such a huge blow.
Narrator / Stephanie Ramos
To this day, Lauren describes a sense of disbelief about what she and her dad went through.
Lauren Preyer
It's just unreal that it happened to our family. You never think anything that's like that would ever happen. And he had to live with that until 2017. And he still didn't know. But all those years.
Narrator / Stephanie Ramos
As the years passed, Lauren says she kept prodding police for updates in her mother's case.
Lauren Preyer
I never gave up. I never gave up. I called all the time. I knew someone knew something, you know what I mean? So I just didn't give up. And finally one day my phone rang and. And I didn't even answer because I didn't know the phone number. And then I got a message saying were calling about your mom, Leslie Preyear. And I said, what?
Narrator / Stephanie Ramos
The phone call was from a detective with the Montgomery County Cold case unit. A new set of detectives had picked up the investigation into Leslie's death. These detectives would reexamine the 20 year old evidence in Leslie's case file. And with the help of new technology, they would finally crack the case wide open. From ABC Audio In 2020 I' Stephanie Ramos. This is Blood and Water. Episode 4 Family Tree. The office of the Montgomery County Cold Case Unit is in the basement underneath police headquarters. The room is windowless. Glamorous it is not. But it's the sort of hidden away place where no one bothers you, where a detective can disappear into their work. The office is crammed with heavy duty shelves. On these shelves sit dozens of boxes
Detective Allison Dupois
with any cold case. We're gonna take the box out and it's usually a big dusty box with lots of files. It could be several boxes and you just kind of go through each file one at a time.
Narrator / Stephanie Ramos
This is Detective Allison dupois. Detective Dupois spends her days here among the boxes that represent Montgomery County's unsolved crimes. And of course, behind every unsolved homicide or sexual assault or kidnapping, there are the victims and loved ones who never got answers.
Detective Allison Dupois
When you're in the cold case unit, you get to reconnect with families who have otherwise probably have feeling like they've been forgotten by the police department. And we get to make contact again and kind of try to give them maybe some hope and just let them know that we're thinking about this case again and taking a fresh look at it. Leslie Purr's murder has been open for over 20 years. When I got to the cold case unit, it was one of many boxes that are sitting on our shelves. And when Tara joined Our unit, she just picked right up on it.
Narrator / Stephanie Ramos
Tara is Alison's partner, Detective Tara Augustian. Over her 20 year career in the police department, Tara, she had long hoped to join the cold case unit.
Detective Tara Augustin
These are all major crimes. They're either homicides or rapes. And I like the challenge of trying to look at everything with fresh eyes and not take the same viewpoints that the previous investigators had. And when it's successful, it's a huge satisfaction that you're able to do something for the families and give closure.
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Narrator / Stephanie Ramos
In 2001, detectives Augustine and Dupois were college students living in and around D.C.
Detective Tara Augustin
it's funny because she and I didn't know each other then, but we also used to go, like, hang out with friends in all the same places in Chevy Chase. And we may have even passed crossed paths with Lauren at some point in our lives and not realized it because we were all in the same area at the same time but didn't know each other.
Narrator / Stephanie Ramos
Did the case appeal to you more because the areas that were mentioned in the case were so familiar to you?
Detective Tara Augustin
It definitely did, I guess, have more of a connection to it.
Narrator / Stephanie Ramos
As the two detectives began working on the case, they got to know Lauren Pryor. Lauren, who was 23 when her mother was killed, was now in her mid-40s. Her mother's murder and the mystery of what really happened that day had hung over Lauren for almost half her lifetime.
Detective Allison Dupois
It was very, very emotional for Lauren. I mean, she could just see it on her face and in her demeanor that she was just so grateful that somebody was looking at this and thinking about her mom again. And really she wanted to clear her dad's name. That was really important to her to let everybody know that her dad didn't do this.
Narrator / Stephanie Ramos
And soon these detectives would find the evidence to prove just that.
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Detective Allison Dupois
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Debra Roberts
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Narrator / Stephanie Ramos
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Narrator / Stephanie Ramos
I'm like, oh my God, he's lying.
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Narrator / Stephanie Ramos
Last summer, I spent some time with detectives Augustine and dupois. We went through some of the materials in Leslie Prayer's case file. This evidence, collected two decades earlier, was their starting place. We spread everything out across a big table. It was a big mess of photos, documents, pieces of a puzzle. The most difficult to look at were the crime scene photos taken inside the PR's home. So this here, this is the foyer of the house?
Detective Tara Augustin
Yes. This is the front door right here.
Detective Allison Dupois
So this is what Sandy and Brett Reedy would have seen when they came into the house.
Narrator / Stephanie Ramos
There was blood throughout the pre home, including some crucial spots in and around the kitchen.
Detective Tara Augustin
So this is the back door in the kitchen. And this is a drop of blood that was smeared. And there's a doorway right here that separates the dining room from the kitchen. And on that doorway, there's another drop of blood that was found.
Narrator / Stephanie Ramos
These drops of blood contained that unknown male DNA, the DNA that was not Sandy's. Authorities learned of this other DNA a few months after Leslie's killing. It was significant because it suggested that someone else had been in the house when Leslie was killed. And yet, even after the discovery of the unknown male DNA, investigators back in 2001 still believed that Sandy Preer remained a viable suspect. Some 20 years later, detectives Augustine and Dupois examined the evidence collected by the earlier detectives and they came to a different conclusion. One detail police had noted in the original investigation was Sandy's demeanor at the crime scene.
Detective Allison Dupois
Police officers will go and they'll draw their weapons to search a house. Sandy made a joke about, oh, you know, they're really taking this seriously.
Narrator / Stephanie Ramos
The exact quote in the police report was, you guys mean business. There's blood at the scene his wife is missing, and he makes a joke.
Detective Allison Dupois
Yeah.
Narrator / Stephanie Ramos
Well, how did that land with you when you read that?
Detective Allison Dupois
You know, these kinds of circumstances, you don't know how you're gonna deal with it. Some people make jokes. Some people might be hysterical. Some people might not take it seriously at all at first, and some people take it very seriously. So I think you have different. Different ways of dealing with this stuff. But certainly that did not help Sandy's case.
Narrator / Stephanie Ramos
Another thing that didn't help Sandy's case was that he failed the polygraph test. But as Detective Augustin points out, lie detector tests aren't exactly infallible.
Detective Tara Augustin
Polygraphs are tricky. They're not admissible in court. You know, they're an indicator that the person is having a response in their body, a physical response to whatever questions are being asked.
Narrator / Stephanie Ramos
Detective Augustine says Sandy took that polygraph shortly after detectives told him that Leslie's death was considered a homicide. She says Sandy understood immediately that was bad news for him.
Detective Tara Augustin
This is the first time he realizes that. And he even says to them, I know where this is going. He knows in his mind that they suspect that he's the killer, and he volunteers to take a polygraph. So his. His stress level is pretty high already. He goes right from this interaction with the detectives, follows them and goes to the police station and takes a polygraph immediately after. I can see how he would have failed, because it's a very stressful situation. The police think that he killed his wife, and he didn't.
Narrator / Stephanie Ramos
Detectives Augustin and dupois know today that Sandy Preer did not kill his wife. So they also know that certain pieces of evidence, the failed polygraph, the odd jokes, aren't what they first seemed. This is part of what makes police work so difficult. Investigators not only have to uncover evidence, but they have to decide what that evidence actually means, if it means anything at all. Still, given the prolonged and ultimately incorrect focus on Sandy, I had to ask detectives Augustine and dupois, did investigators focus too closely on Sandy Prear? Did that focus distract them from finding the actual killer?
Detective Allison Dupois
I think at the time, especially before the presence of the unknown DNA was available to them, he was the prime suspect. And I think there was good reason for them to focus on him. Once the presence of the unknown DNA was. Was there, it was almost as if they were trying to find a reason why Sandy was acting so suspiciously, because a lot of his movements, a lot of his reactions, the failed polygraph, they all were mounting up to, you know, probable cause.
Detective Tara Augustin
And had it not been for that unidentified male DNA under her fingernails and in the crime scene, he probably would have been charged
Narrator / Stephanie Ramos
instead. No one was charged in the death of Leslie Prier for the next 20 plus years. And over those two decades there were few promising leads. That is until detectives took that unknown DNA and began trying to find its family tree.
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Narrator / Stephanie Ramos
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Narrator / Stephanie Ramos
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Narrator / Stephanie Ramos
DNA evidence can be very useful if you get a match. But back in 2001, after tests were run on the DNA found at the scene of Leslie Preer's murder, no matches were found. Not in the federal CODIS database of violent criminals and not among Leslie's family and friends. In hindsight, this dead end showed the limits of forensic DNA. In 2001, that federal database of violent offenders, well, by definition, it's limited to violent offenders. That's a pretty small pool of potential matches, at least compared to what came next tonight, an arrest.
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Narrator / Stephanie Ramos
About a decade ago, law enforcement began using a new kind of database, a pool of DNA wider and deeper than anything before. It's a cutting edge genetic tool now heating up the coldest of cases.
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A genetic profile created from crime scene DNA was uploaded to a public genealogy database.
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Narrator / Stephanie Ramos
Genetic genealogy has revolutionized detective work, especially in cold Case investigations. It began with the excitement around at home, DNA tests and ancestry websites. As everyday people spat in tubes and mailed them off, new databases began to grow. Soon, these databases contained the genetic information of millions of people. Today, these databases are big enough and DNA tests sensitive enough that you can build family trees containing the names of people who never submitted their DNA at all. These tools were a revelation for people interested in their ancestry and for law enforcement as well. Police, often working with outside labs, began using some of these databases. Building family trees with the DNA of suspects at the center in 2022, detectives Tara Augustin and Allison Dupois sent some 20 year old blood to a lab. Soon, the detectives received a list of partial matches for that unknown male DNA.
Detective Allison Dupois
We get shared matches of people from all over the place and they can be really low matches, which means that they share a very minimal amount of DNA with our suspect. The higher matches, that's more DNA. So that's going to be maybe a little bit easier of a family tree to build.
Narrator / Stephanie Ramos
Detectives spent months building family trees. They used not only the DNA test results, the lists of online profiles that were high or low matches, but another source as well.
Detective Allison Dupois
Historical documents, obituaries, marriage documents, census records, all of those things. That's what we have to do when we're building the family trees. So it's a little bit of like history detective as well as regular detective work.
Narrator / Stephanie Ramos
This work often resembled that of an amateur genealogist, except instead of trying to track down their ancestors, they were trying to track down a potential murderer. Genealogy databases have genetic information for people all over the world, but things like census records and obituaries, they're not always that easy to find abroad. So detectives started building family trees featuring lots of American families, searching for someone who might have been in Maryland in May 2001. The problem was the Americans who populated these family trees, they shared on average, less DNA with the unknown male subject. They were multiple degrees removed from the possible killer. In the end, these lower matches got detectives nowhere.
Detective Tara Augustin
It had been about a year and a half of working on these low matches and I, I just wanted to. Why don't we explore these higher matches?
Narrator / Stephanie Ramos
The higher matches tended to lead back to people who lived outside the United States. One match led them to, of all places, Romania.
Detective Tara Augustin
Just doing basic Google searches and looking at publicly available data. I was able to find out a lot of information about this family line from someone that actually had done a lot of genealogy work that is in the family.
Narrator / Stephanie Ramos
Specifically, the detectives found a blog maintained by a sort of Family genealogist. It featured lengthy posts written in Romanian, interspersed with black and white photos and scans of newspaper articles, Precisely the kind of primary sources the detectives needed.
Detective Allison Dupois
This person had done a really thorough job of documenting a lot of that stuff.
Detective Tara Augustin
And in one of the blog posts, I came across the name Virgil Glegore.
Narrator / Stephanie Ramos
Virgil Glegor.
Detective Tara Augustin
That kind of clicked in my head because I remembered the name Glegor, and I knew it was in the case file.
Narrator / Stephanie Ramos
The name Gleegore was in the case file because it was the surname of a Eugene Glegor. Lauren Preyer's high school boyfriend. Eugene Glegor had been the subject of a tip. Detectives Scott. Back in 2002, a lady that lived
Detective Tara Augustin
in the neighborhood where this individual, Eugene Glegor, lived said, I know that he used to date the victim's daughter, and he was getting in trouble in the neighborhood for noise complaints and just nuisance things where the police had come out there. For some reason, he stuck out to her, and she said, I just want to let you guys know, look at this guy. It was just a hunch.
Narrator / Stephanie Ramos
The detective who took the tipster's call back in 2002 did act on it.
Detective Tara Augustin
He went by the residence that the tipster had given to try to locate Eugene or to get any information about him. And it appears that he hit a couple of dead ends. And that was.
Detective Allison Dupois
Seems like, you know, Eugene at that time may have just fallen into the list of people who knew the family and who were acquainted with the family. And, you know, maybe it would have been a knock and talk and a request for DNA, but they weren't able to locate him. And it just is one of those, you know, loose ends that was never tied up.
Narrator / Stephanie Ramos
It's worth emphasizing, according to law enforcement, police had no probable cause connecting Lauren's high school boyfriend with her mom's murder. The two had broken up a few years before Leslie's murder. By all accounts, the breakup was perfectly amicable. And at the time of the murder, Lauren and Eugene weren't really in each other's lives anymore.
Detective Tara Augustin
There never was any indication that there was a bad relationship between Lauren and him or Leslie and him. And it just. His name was brought up, and they looked at him and they said, well, you know, he's gotten in a little bit of trouble with the police. But nothing raised flags to say, hey, this guy's a killer.
Narrator / Stephanie Ramos
But there was someone else suspicious of Eugene even before Leslie was murdered. Here's Lauren.
Lauren Preyer
My dad never liked him. He thought there was always something off and, you know, A dad's instincts. And of course, as being a teenage girl, I was like, daddy, you're just being a protective dad.
Narrator / Stephanie Ramos
What would your mom say about that? Knowing that your dad wasn't 100% on board with Eugene?
Lauren Preyer
She would just say, you're being overprotective. He's a good kid kind of thing. And then after she was gone, he said, you think Eugene can be a part of this? It was mentioned more than one time. And again, of course, I said, no. Like, what are you talking about?
Narrator / Stephanie Ramos
Her high school boyfriend killing her mom. Lauren didn't buy it. And police say Eugene Glegor didn't have a rap sheet that screamed murder.
Detective Tara Augustin
Eugene did have some police interactions throughout the years. At some point, he had been charged with marijuana possession. There were a couple of incident reports for thefts or burglaries where he was listed as a suspect, but he was never charged because either there wasn't enough evidence or the families decided not to go forward with anything.
Narrator / Stephanie Ramos
So these findings didn't really paint a picture of a brutal, bloody murderer, did it?
Detective Allison Dupois
No, not at all. No.
Narrator / Stephanie Ramos
And yet the discovery seems significant. A partial genetic match that had led detectives to a name that had come up during the original investigation. A name that was in the case file.
Detective Tara Augustin
I remember I was downstairs in our office, and I. I said, allie, come over here and look at this. Look at this and make sure it makes sense. And I. I think this is something really good. And. And she came over and she was like, oh, wow. And I thought, this is a really good lead. Like, this is, like, the biggest break we've had up until this point.
Narrator / Stephanie Ramos
Detectives looked into Eugene Gligor. What they learned was troubling.
Detective Allison Dupois
I ended up leaving that house that night. I did not stay there because I
Detective Tara Augustin
was afraid of him.
Narrator / Stephanie Ramos
She thought he might go after her.
Detective Tara Augustin
Once I saw that, that kind of changes things to where he might be capable of actually killing someone.
Narrator / Stephanie Ramos
Blood and water is a production of abc audio in 2020, hosted by me, stephanie ramos. Produced by madelyn wood, shane mckeon and kiara powell. With help from emily schutz and caitlin schiffer. Edited by gianna palmer. Our supervising producer is susie lu. Music by evan viola. Mixing and mastering by bob mallory. Scoring by kiara powell. Special thanks to katie dendoz, janis johnston, sean dooley, chris donovan, camille peterson, christina corbin, gail deutsch, amanda carr, ellie joestad, ng adam and michelle margulis. Josh cohan is our director of podcast programming. Eamon mcniff is our executive producer.
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Podcast: 20/20 (ABC News)
Date: May 20, 2026
Host/Narrator: Stephanie Ramos
Episode Theme:
Delving into the shocking, decades-long investigation into Leslie Preer's 2001 murder—and the devastating misidentification of her husband Sandy as the killer, only for advances in forensic genealogy to reveal the real suspect over 20 years later.
This episode of "Blood and Water" on 20/20 follows the heartbreaking journey of the Preer family after the 2001 murder of Leslie Preer. It centers on the wrongful suspicion and lifelong consequences for her husband Sandy Preer, the relentless efforts of his daughter Lauren to clear his name, and the breakthrough that finally pointed to the real killer using advanced genetic genealogy. Through investigative narrative, interviews, and behind-the-scenes detective work, the episode explores the power and pitfalls of evidence, memory, and new forensic technology.
The episode maintains a somber, reflective, and at times hopeful tone—blending forensic detective rigor with the raw emotional toll on survivors. The detectives and Lauren’s accounts are personal, candid, and honest, emphasizing both the burden of suspicion and the elation and sorrow that comes with a breakthrough.