Sneak peek: Stalked

Singer Christina Grimmie was killed by a stalker and Ivanka Trump has been stalked, too; now, an "NCIS" star is trying to change stalking laws. "48 Hours" correspondent Erin Moriarty investigates Saturday, Sept. 9 at a special time, 9-11 p.m. ET/PT on CBS.

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"48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. For 27 seasons, "48 Hours" 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. Check local listings for "48 Hours" broadcast times.