Video Description

A teenager stabs his sister — a crime with no known motive. His defense says he was sleepwalking. "48 Hours" correspondent Erin Moriarty reports. Watch more full episodes of "48 Hours" on Pluto TV. #48hours #crime #mystery 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. Subscribe to the "48 Hours" YouTube channel: https://youtube.com/48hours Watch full episodes of "48 Hours": https://cbsnews.com/48-hours/full-episodes/ Listen to the "48 Hours" podcast: https://link.chtbl.com/48-Hours Listen to the "My Life of Crime with Erin Moriarty" podcast: https://link.chtbl.com/CBSNewsMLOC Follow "48 Hours" on Instagram: https://instagram.com/48hoursCBS/ Like "48 Hours" on Facebook: https://www.facebook.com/48hours Follow "48 Hours" on Twitter: https://twitter.com/48hours Subscribe to our newsletter: https://cbsnews.com/newsletter/ Download the CBS News app: https://cbsnews.com/mobile/ Try Paramount+ free: https://paramountplus.com/?ftag=PPM-05-10aeh8h For video licensing inquiries, contact: [email protected]