48 Hours The Boy Who Killed His Twin
Sep 29, 2025
Dr. Gerald Simmons, a neurologist and sleep-disorder specialist, dives into the chilling case of a teen who stabbed his twin sister, claiming sleepwalking was to blame. He discusses the complexities of parasomnias and how sleep studies revealed Benjamin's obstructive sleep apnea. Dr. Simmons explains the involuntariness of Benjamin's actions during a sleep episode, while contrasting voices present skepticism about his defense. This fascinating exploration of the intersection between sleep disorders and criminal behavior raises deep questions about consciousness and culpability.
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The 911 Call And Immediate Aftermath
- Benjamin called 911 saying, “I just killed my sister,” and described thinking it was a dream.
- Paramedics and family arrived while he begged for help and attempted CPR.
Sleep Physiology As A Trigger
- Dr. Gerald Simmons concluded Benjamin had obstructive sleep apnea and rapid entry into slow-wave sleep.
- That physiology can trigger non-REM parasomnias like violent sleepwalking, supporting a sleepwalking defense.
Family And Childhood Sleepwalking History
- Benjamin had prior childhood sleepwalking episodes, including being found at a door and once asleep eating a donut.
- Multiple family members also reported sleepwalking histories, suggesting a genetic predisposition.