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The Boy Who Killed His Twin | Post Mortem

October 04, 2025 / 26:03

This episode of Postmortem discusses the case of Ben Elliot, who murdered his twin sister Megan in 2021. The episode features hosts Ann Marie Green and Aaron Morardi, who analyze the complexities of the case, including sleepwalking as a defense, the emotional impact on the family, and the jury's deliberation process.

Ben Elliot, who was 17 at the time, admits to stabbing his sister but claims he was sleepwalking. The hosts discuss the challenges of proving intent in such cases, especially given the lack of evidence for a motive. They highlight the conflicting expert testimonies regarding sleepwalking and its implications for Ben's guilt.

The episode also covers the emotional turmoil experienced by the Elliot family, particularly the parents, Michael and Kathy, who grapple with the loss of their daughter and the potential loss of their son. The prosecution's portrayal of the family as involved in a cover-up adds to the complexity of the case.

Key moments include the analysis of Ben's demeanor during police interrogation and the impact of his behavior on the jury's perception. The hosts reflect on how jurors' familiarity with sleepwalking may have influenced their decision-making.

Ultimately, the jury finds Ben guilty of first-degree murder, leading to a 15-year prison sentence. The episode concludes with reflections on the family's ongoing grief and Ben's appeal process.

TLDR

Ben Elliot claims sleepwalking defense after stabbing his twin sister, leading to a complex murder trial and emotional family fallout.

Episode

26:03
00:00:00
[Music] Welcome back to Postmortem. I'm your host, 48 Hours correspondent Ann Marie
00:00:11
Green. And joining me today to discuss the season premiere episode of 48 Hours is 48 hours correspondent Aaron Morardi.
00:00:20
Erin, how many seasons has it been for you now? >> Okay, I was trying to count and I think
00:00:24
it's 35, which means isn't this your first full season? So, you have a little bit to catch up with me.
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>> All right. I'm working on it. I'm working on it. I still with all those seasons under your belt. This is quite
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an episode. I don't know if you've done anything like this one before. It's the perplexing case of Ben Elliot. He
00:00:45
murdered his twin sister Megan in 2021. They were both just 17 years old at the time. Now, Ben maintains his innocence.
00:00:53
He admits that he stabbed his sister, but he says he was sleepwalking and he did not intend to harm her. So, this is
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one of those episodes, Aaron, that throughout the hour, my mind kept on changing about whether or not, you know,
00:01:08
I felt it was intentional. I felt that, you know, whether or not he was guilty. I just I couldn't really decide. You
00:01:16
know, Amarie, I'm with you. I was conflicted as well when I first started on the story. I thought, well, that's a
00:01:22
novel defense. Um, you know, but I thought of it as a defense, but I have really gone 180. The problem here is our
00:01:32
judicial, our criminal judicial system that is based on adversarial uh sides. Uh, the courts want to find guilt or
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innocence, guilt or not guilty. Um, in this case, we know he did it. He, you know, Ben Elliott admits he stabbed his
00:01:51
sister, but we don't know why or if he intended to. And the other problem with this case, which you and I will talk
00:01:58
about, is this is a young man who never shows a lot of emotion. >> Absolutely. We will get into his
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demeanor, but before we even sort of get into the case, we'll just remind people
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that if you haven't actually listened to this episode of 48 hours, you can do so.
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You can find the full audio version just below this episode that you're listening
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to in your podcast feed. Go take a listen and then come on back for this conversation. Okay. You actually have a
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pretty unique perspective here. Um, you are a twin, which I'm just learning. >> I am a twin. I have a twin sister. We
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are not identical, but we are very close. And so this case hit me hard. It was hard not to look at this case as a
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twin. I can't in a million years imagine hurting my twin. It's the person I knew
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before anybody. Um, and in this case, there didn't seem to be any problem between these two people. So, how do you
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make sense of that? Yes, the prosecution argues that Ben intentionally killed his
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sister and that he wasn't sleepwalking, that this was just sort of an excuse, something that he made up. but they
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never really established a motive. And me as the viewer/jur watching this, that bothered me. What was so troubling about
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this case is that not only was there no evidence of a motive or a problem between these twins, everyone uh that
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the prosecution talked to said that that Ben loved his sister and and loved being
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her protector. she was she had been diagnosed um as autistic and he according to the witnesses wanted to
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protect her. But here's something else to think about. They couldn't find any evidence um on either one of the twins
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phones. You would think if there was a problem between the two there'd be some kind of text uh trail. Uh another thing,
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this is a young man who used his phone all the time. if he was just going to use sleepwalking as a defense, an
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excuse, wouldn't you think he'd do some research? They didn't find any. Uh, so I found
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this all so troubling because again, the prosecutors say he's a danger to society. That's why they charged him
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with firstdegree um and and fought to get him convicted of firstdegree murder. And yet there's
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no evidence other than the act itself, which is pretty awful. Uh that that he really intended to do this.
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>> Mhm. I I think that though that that would have helped me as I was watching the hour if they could give me a re the
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why even though they don't really have to. Um but the other thing that I kept on thinking about as as I was watching
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the hour is just how much do you know about sleepwalking? I think immediately what comes to mind is sort of this
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visual of this person walking with their eyes closed and their arms out sort of zombie like not you know somebody doing
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sort of complicated tasks but I have to say I have heard some crazy things about
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people you know could be an urban myth but I mean cooking a turkey while sleep walking and that all that sort of stuff.
00:05:23
>> Well you know it's not crazy for someone to to actually cook while they're sleeping. I learned that. Um so just so
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that people understand what it is there's a large category uh called parasomnio and sleepwalking is one of
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those um so is sleep eating or if you want to say sleep cooking um and it really happens and it's more common than
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I realize it is. Uh but crimes committed uh while you're sleepwalking is less common although it does happen. Here's
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the real problem Amarie and it was a problem reporting on this. There are no usually no witnesses to somebody
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sleepwalking and so they sometimes have to kind of guess about what happens during those episodes. So we have
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experts because they were used in the trial uh both on the defense side and on the prosecution side and both sides
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agree that parasomnia sleepwalking does occur. They also agree when it occurs it
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it occurs during a period of your sleep which is nonrem slowwave sleep. Um and it's when you're almost like in a
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twilight zone between sleep and being awake. But then the experts disagree. And here's the problem. You have the
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defense witness saying that there are pockets of memory and that's why Ben Elliot could remember stabbing, but the
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the states witness says there are no pockets of memory. The fact that he could remember stabbing his sister meant
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he was not sleepwalking. And you know what we're talking about here too is not just sort of like stumbling around your
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bedroom, right? We're talking about a very violent act. I I do the experts have any opinion on what might cause
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someone who's normally not violent to act out violently in their sleep? Dr. Pressman, the prosecution sleep expert,
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said that something has to happen to the sleepwalker. somebody has to interfere with their movement. Uh but again,
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because in most of these cases, there are no cameras, no witnesses, they don't know exactly. We don't know what
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happened in that bedroom. Did Megan wake up? Did she put a hand up to try to stop
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him? We don't know. Dr. depressment. Um he said something along the lines of, you know, he knew that he wasn't
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sleepwalking because he came out of it quickly. And I just sort of thought, how did he know how quickly he came out of
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it? Because there were only two people in that room and it certainly wasn't the expert.
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>> Exactly. He's claiming that the fact that Ben said, "I remember stabbing her," meant that he had come out quickly
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to have that kind of memory. Uh Dr. Presman says he shouldn't have any memory of it. The prosecution actually
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used uh the fact that Ben had some memory against him by saying that Ben had actually killed his sister earlier
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and had time to come up with uh a story. Uh and then calling 911. >> Again, as you point out, Emory, there
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were no cameras. There were no witnesses. We don't know and the experts don't know. Mhm. So, here's kind of like
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my journey uh with Ben, right? Initially, I just thought, you know, his presentation is a little odd. And it
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starts with that 911 call. At this point, you've listened probably to hundreds of 911 calls. You know,
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sometimes people are frantic and yelling. Sometimes they are very measured and controlled. They want to
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get the information out. Ben had this soft whispery voice. It just was a little odd.
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>> Well, and it was odd to the prosecutors. That was part of the trial. The in fact,
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the prosecutor imitated the phone call in front of the jurors and was whispering. And that's fair to an extent
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because certainly when you listen, as you did, Amory, it does sound like he's whispering and he may have been. But I
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also want to point out that when I met Van Elliott in the jail and interviewed him, he is very soft-spoken and he
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doesn't show a lot of emotion. And what he said to me was uh that he wasn't whispering. That that's how he talks.
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>> But then why didn't he scream out to his parents? That was the other thing that
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kind of bothered me. I thought like why is it that the parents are finding out what's happening, you know, when the
00:10:19
like cops are showing up? Like why wouldn't he say, "Oh my god, help me." >> Well, you know what, Emry, that is such
00:10:25
a good question and it's certainly what the prosecution pointed out. Like why did he call 911? Why did he keep his
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voice down? He didn't want his parents to know. And that's possible. But can I just point out here's where my
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experience as a twin comes in. Uh so when you are a twin, whether you're identical or not, you have a real
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closeness. That is who you share everything with. And I just want to throw out that possibility that as a
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twin, he was calling 911 because he was thinking of his sister and then didn't think about calling his parents until
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the 911 operator asked him to. It's a possibility. As a twin, I see that as a possibility. I think the other thing
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that really surprised me about this episode is just how many people are familiar with sleepwalking because I
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kind of went through it's nowhere close to sleepwalking but my husband talks in his sleep and when we first met it would
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be sort of this mumbly stuff that I couldn't understand but it's definitely progressed over time but I mean one of
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the prosecutors was a sleepwalker her children jurors knew sleepwalkers I I was like how many people are
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sleepwalking and then I also thought could that have an impact on, you know, whether the not they thought he was
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guilty or innocent because I don't I don't know. Do you know if their familiarity with sleepwalking had an
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impact on how they decided this case? >> I think Emory, it was a double-edged sword. In one hand, it helped the
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defense because because you had jurors who knew that sleepwalking exists and they heard during the trial that Ben
00:12:09
seemed to have a a history of sleepwalking. The other side of that uh sword is though that committing a crime
00:12:18
while sleepwalking is very rare. Uh none of the people who were familiar with sleepwalking knew someone who committed
00:12:25
a crime. And I think that's hard for someone to believe that even jurors who knew that people sleepwalk to believe
00:12:34
that someone could actually commit a terrible crime like this. Uh they also heard testimony for do from Dr. Presman
00:12:42
who says that >> during sleepwalking you can't have conscious thought um and made a big deal
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that in order for Ben to have stabbed his sister he had to pull his knife out of the sheath and Dr. Presman testified
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that that was too much of a conscious thought. Uh and yet you and I know um that there have been cases where
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somebody has driven uh and then committed a crime while sleepwalking and the jury acquitted that
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person of murder. >> Welcome back. Uh let's dive into the really chilling body cam footage. When
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first responders arrive on the scene, Ben is giving Megan CPR compressions. His parents, uh, Michael and Kathy, they
00:13:34
are there. They are distraught. They are confused. They ask police what has happened to their daughter, Megan. Well,
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Emory, at first glance, when you see that body cam footage and you see these parents asking and the police are
00:13:50
saying, "We're not going to tell you." It seems cruel at first glance, but you have to realize that they're walking
00:13:56
into that house not knowing what happened, who exactly was involved. They just know someone inside that house was
00:14:04
involved. Maybe they all were. And so until they could really understand what happened, I they did not want to share
00:14:11
any information. They didn't want anyone in the house sharing stories, getting a
00:14:17
story together until they could figure out exactly what did happen. It really makes more sense when you look at it
00:14:24
from the vantage point of these investigators walking in cold. It It does make sense, I imagine, for
00:14:31
Michael and Kathy though, as this whole thing sort of continues to unfold, they then decide that they're going to
00:14:38
call a family friend who happens to be an attorney. Now prosecutors use that decision a little bit against them,
00:14:46
frame it like it's a very suspicious thing to do. Well, and we see this over and over
00:14:53
again in these cases, Amarie. So the family wants to know what to do most of the time. They've never been involved in
00:15:02
a situation like this. So they had a friend who was a lawyer and and in fact that lawyer helped them find out what
00:15:10
happened to Megan. That's how they found out that their daughter had died. But then at trial it was used against uh the
00:15:18
family by the prosecution. And we see that happening over and over again in cases. Um the prosecutors said that the
00:15:27
family um had conducted a cover up from the and I'm quoting the get-go, you know, from the very beginning because
00:15:37
from the prosecution's viewpoint, if you have nothing to hide, why are you calling a friend who's a lawyer? So
00:15:44
Ben's family, you the his parents, they're already going through this heartbreaking experience. But now part
00:15:52
of the prosecution's narrative is and they're involved in a cover up. Their head must have been spinning. Well, can
00:16:01
I just tell you this was one of the most emotional interviews I've done with parents as you can imagine. They have
00:16:07
lost a daughter. They are they feared they'll lose their son. They for the first time I found out that they thought
00:16:15
maybe he had schizophrenia. They really seemed and they said to me that they really wanted to know what happened. So
00:16:23
they were very upset with the idea that anyone would accuse them of a cover up. And they point out that Ben was willing
00:16:32
to talk to the state's expert, sleep expert, but that the state sleeps expert did not want to talk to Ben. uh that
00:16:41
expert felt he had enough information by looking at the reports and and every evidence in the case and did not need to
00:16:49
talk to Ben was what what he said to me. So the family was devastated with the claim that they were trying to cover up
00:16:57
because that's not how they saw it. The jurors really got to see Ben Elliot's police interrogation.
00:17:05
I'm curious as to, you know, what they felt about his demeanor and what you felt about his demeanor because you
00:17:13
spoke to him. >> That's the hard part, Emory, in these cases. Um, we are judging people by how
00:17:20
they act under the worst moments of their lives, but we've never met those people before. So, it's a very tough
00:17:28
part of any criminal trial to try to figure out how do you judge the demeanor of somebody. The Ben that I saw on
00:17:38
police cam footage was very similar to the Ben I met uh when I saw him in the jail. uh he was a little more animated
00:17:51
with me because apparently his grandmother was and is a fan of mine. Um uh and so he did say to me kind of that
00:18:02
his grandmother under different circumstances would be happy to know that that I was the one who interviewed
00:18:09
him. So I saw more of a open talkative Ben. But through most of the interview, the Ben we saw in police cam footage was
00:18:19
pretty much the same guy I interviewed and his parents told me the same thing that that is who he is. I did talk to
00:18:28
him about um his affect and the fact that he was talking about things that seem so unrelated to what had just
00:18:35
happened to his sister. You see him during the interview with the the detective talking about, you know, he's
00:18:44
just been taken from his home after stabbing his sister and he's talking about taking his SAT. That struck me
00:18:52
when I saw it and he said to me that he had just shut down. He didn't want to believe that he had done what he had
00:18:59
done to his sister and he was trying not to think about it. So Erin, the other thing that really jumped out at at me
00:19:06
that bothered me, tell you the truth, is that he calls his home, he calls it a crime scene. Did Did you get a chance to
00:19:12
ask him why would you call it a crime scene? Well, I did. Um, and his answer was because it was a crime scene. I
00:19:21
mean, we hear him in 911 saying he's dad killed his sister. So, um, he clearly thought it was a crime. Um he said he
00:19:33
knew that they would cordon it off. I mean he kind of knew what the police would do. Um so he did not find the fact
00:19:42
that he had used that term unusual. So you know that was just some of what the jury um had to consider. Um but there
00:19:51
were other pieces of evidence that swayed them. What were kind of the big pieces of evidence for the jury?
00:19:57
>> Well, you point out demeanor was a big one. the number of stab wounds because
00:20:02
the prosecution did make a big deal about it and one of those wounds was very deep and the prosecution said that
00:20:10
that goes to the idea that he intentionally stabbed her. >> The prosecution also talked to the
00:20:17
jurors about the fact that according to the prosecution there should have been blood spatter. She was stabbed in the
00:20:24
neck and the prosecution, and this is all just their theory. There was no proof of it, but the prosecution
00:20:32
argued that the pillow that was near Megan had been used by Ben to keep her from yelling and that kept uh blood
00:20:42
spatter from hitting the wall. But Ben had said he used the pillow, but he says he did it to try to stop the bleeding.
00:20:51
>> Mhm. >> Near the end of it was during their closing, the prosecutors told the
00:20:57
jurors, "Well, we have no motive, but you never know what goes on behind closed doors." And I think that really
00:21:04
struck the jurors. So, the jurors initially were split uh seven to five, but then ultimately they all come around
00:21:11
and it's a unanimous decision, right? that they find Ben Elliot guilty of firstdegree murder. I just thought like
00:21:17
maybe a lesser charge would have been more appropriate like manslaughter or something like that instead of
00:21:23
first-degree murder. >> Yeah. I should also point out so when you say seven to five, it was seven
00:21:28
people initially were for guilty and five for not guilty. Um when you see that these are young people and a young
00:21:35
defendant, you might think, well, do you really want to do first-degree murder? This is his twin. But what you have is a
00:21:42
17-year-old teenager who's dead and you have two stab wounds. And I think the prosecutors, they believe he had the
00:21:50
intent to kill her and that's first degree and that's why he was charged with that. Um, and I should also point
00:21:57
out with the jurors that even though there were five initially who thought that Ben might not be guilty, they all
00:22:05
came around to a unanimous decision of guilt and were satisfied with that decision at the end. Well, you say that
00:22:15
um we know that prosecutors wanted a sentence of 40 years, but this might give us a little window into what the
00:22:23
jury was grappling with because a member of the jury asked for leniency. It makes you wonder. Well, leniency
00:22:31
according to the juror because he felt so bad for the parents. >> But I I do want to leave you with this
00:22:39
idea of what Ben said to me which I thought was interesting. Ben believes that some of the jurors did have
00:22:46
reasonable doubts. Um, and he points out that the judge could have sentenced him
00:22:51
to 40 years, but instead chose to sentence him to a much shorter period of time. And he said to me, if people
00:23:01
really thought that he had killed his sister in cold blood, wouldn't they want him locked up for the rest of his life?
00:23:09
We'll remind people he got a prison sentence of 15 years. That makes him eligible for parole in 2032. He will
00:23:17
still be a young man, uh, 28 years old if he if he does get parole at that time.
00:23:23
>> And I do want to add, Emory, that um, Ben is appealing this verdict. >> How are his parents and her parents as
00:23:34
well, how are they coping? I it occurred to me that they probably barely had a moment to sort of get over the shock of
00:23:42
Megan's death and and even begin grieving for her before they had to pivot and think about Ben.
00:23:48
>> I have not spoken to them recently, but I did speak with them this summer, and
00:23:55
they are, as you can imagine, just devastated. When you speak with them, you can feel their pain. Um, and and
00:24:04
they're a little bewildered to this to this day, wondering why there wasn't in their mind more of an attempt to find
00:24:12
out what really happened in the early morning hours uh to Megan. They miss Megan. They worry about Ben. They have
00:24:21
an older daughter. And I noticed through the interview, they just held hands through the whole thing. And so I said,
00:24:28
>> "Oh my gosh, you guys, you're getting through this together. this and they said we couldn't have gotten through it
00:24:34
without each other and that was very touching to me. >> Absolutely. Well, this is unlike one
00:24:41
that I've seen so far on 48 hours. Uh I think you're going to take the viewers on kind of a bit of a roller coaster and
00:24:48
I'm curious to see where everyone lands once they watch it. Thank you so much Aaron.
00:24:53
>> Thanks so much Emory. I think we're going to have this in our hearts for a while too.
00:24:58
>> Indeed. Before we leave, Aaron, you have another podcast. Can you tell us about
00:25:02
it? >> It's called 15 inside the Daniel Marsh murders. Um, this is again one of those
00:25:10
cases that it's really hard to shake. This was not only a thrill killer, but he was just 15 when he killed two people
00:25:19
that he did not know, two strangers just to know what it felt like to kill someone. Uh, so it raises all kinds of
00:25:27
of important questions about what do you do when you have a 15-year-old killer who then is diagnosed as a psychopath?
00:25:35
Um, do you keep him in prison the rest of his life? What do you do? And the impact on the the victim's families.
00:25:42
It's it's a a very moving and chilling podcast. So, you can find 15 on your favorite podcast app. If you like this
00:25:52
episode, please rate and review on Apple Podcast or on Spotify.

Badges

This episode stands out for the following:

  • 80
    Most heartbreaking
  • 70
    Most emotional
  • 70
    Most controversial
  • 65
    Most intense

Episode Highlights

  • The Perplexing Case of Ben Elliot
    Ben Elliot admits to stabbing his twin sister, claiming he was sleepwalking. The case raises questions about intent and the nature of sleepwalking.
    “I couldn't really decide if it was intentional.”
    @ 01m 06s
    October 04, 2025
  • The Role of Sleepwalking in the Case
    Experts disagree on whether Ben was sleepwalking during the incident, complicating the trial's outcome.
    “Crimes committed while sleepwalking is less common, but it does happen.”
    @ 05m 57s
    October 04, 2025
  • Jurors' Dilemma
    Initially split, jurors ultimately find Ben guilty of first-degree murder, grappling with the emotional weight of the case.
    “Seven to five, but then ultimately they all come around.”
    @ 21m 11s
    October 04, 2025
  • Ben's Sentence
    Ben received a 15-year prison sentence, eligible for parole in 2032.
    “He got a prison sentence of 15 years.”
    @ 23m 12s
    October 04, 2025
  • Parents' Grief
    The parents of Megan are devastated and bewildered by the events surrounding her death.
    “You can feel their pain.”
    @ 23m 57s
    October 04, 2025
  • Podcast Recommendation
    Aaron discusses his podcast '15' about a young killer and its chilling implications.
    “It's a very moving and chilling podcast.”
    @ 25m 46s
    October 04, 2025

Episode Quotes

  • This is a young man who never shows a lot of emotion.
    The Boy Who Killed His Twin | Post Mortem
  • I can't in a million years imagine hurting my twin.
    The Boy Who Killed His Twin | Post Mortem
  • You never know what goes on behind closed doors.
    The Boy Who Killed His Twin | Post Mortem
  • We couldn't have gotten through it without each other.
    The Boy Who Killed His Twin | Post Mortem
  • This is unlike one that I've seen so far on 48 hours.
    The Boy Who Killed His Twin | Post Mortem
  • It's a very moving and chilling podcast.
    The Boy Who Killed His Twin | Post Mortem

Key Moments

  • Twin Connection02:35
  • Sleepwalking Defense06:28
  • Emotional Parents16:07
  • Jurors' Decision21:11
  • Ben's Appeal23:27
  • Devastated Parents23:57
  • Unique Case24:41
  • Chilling Podcast25:46

Words per Minute Over Time

Vibes Breakdown