Sneak peek: The Boy Who Killed His Twin | Forensic Files

[Music] Harris County. What's the location of your emergency? >> I just killed my sister.
>> Oh my god. >> Tell me what your name is. >> Benjamin Elliot. >> Okay. Tell me exactly what happened.
>> I thought it was a dream. I I took my wife and I stabbed her. Please, I don't want to survive.
>> How old is she? >> 17. We're twins. >> Is she awake? >> Yes. She's like barely alive.
>> Is there anyone else there in the house with you? >> There is. It's my parents, but they're
asleep. >> Okay, I need you to go wake them up. >> Mom, >> we're going to have to start CPR right
now. One, two, three, four. One, two, cup chest. Just like that. Okay. >> Where's your son? Where's your son?
>> Okay. Okay. We got EMS is coming. >> Okay. Slow down a little bit. 1 2 3 4. 1
2 3 4. >> Can we take over? Can you >> What happened? It was a dream. >> He said it was a dream. Honey,
>> what the >> I don't know what I don't know what I'll do. You know, it was just a dream and then it wasn't.
>> I'm going to do a search of you real quick and then I'm going to put you in the back seat on this rain. Okay.
>> What was your first reaction when you heard about the case? >> I was skeptical. Why does he have a
knife next to his bed at night? This is the first study that we did on Ben. I'm Dr. Gerald Simmons. I'm a neurologist,
sleep disorder specialist. See, these are rapid eye movements. I was asked to review the case of Benjamin Elliot. The
claim was that he was sleepwalking and stabbed his sister. We have a video of him right here.
>> Oh, there he is. >> Yeah. Okay. >> You are convinced this was a sleepwalking incident?
>> Yes. >> Are you saying then that he did kill his sister, but he didn't intend to kill his
sister? I wouldn't say that it's impossible for someone to commit a crime while sleepwalking. I just don't think that
was the case with Benjamin Elliot. >> Were you able to find any evidence that there was a problem with these twins?
>> No, we definitely looked into it and tried. The biggest thing that they're hanging their hat on is the lack of
motive. >> My name is Megan Long. I'm one of the prosecutors on the case. So, >> this is really hard, isn't it, Mike?
>> I hate this. I hate that she's gone. >> This was not Benjamin's fault. >> I've never thought of him as somebody
responsible for this. >> What makes you so sure that you stabbed your sister while you were sleepwalking?
>> I would never have done that. I loved her. She was my best and closest friend.

SEASON PREMIERE: A teenager stabs his sister – a crime with no known motive. His defense says he was sleepwalking. "48 Hours" correspondent Erin Moriarty reports Saturday, Sept. 27 at 10/9c on CBS and streaming on Paramount+.

True crime. Real justice. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives.

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Brief Summary

Benjamin Elliot stabbed his sister while allegedly sleepwalking, raising questions about intent and responsibility in a tragic case.

Key points

A Shocking Confession. Benjamin Elliot confesses to killing his sister during an emergency call.
The Struggle for Life. Emergency responders attempt CPR on Benjamin's sister, who is barely alive.
Sleepwalking Defense. Experts discuss whether Benjamin was sleepwalking when he stabbed his sister.

Episode highlights

Episode quotes

I just killed my sister.

Emergency call confession

0:07WatchSep 22, 2025

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