Sneak peek: The Boy Who Killed His Twin

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+.

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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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