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What happened to Gabby Petito?

The disappearance of travel blogger Gabby Petito while on a cross-country trip with her fiancé Brian Laundrie generated nationwide interest. What happened between Petito and Laundrie in the days leading up to her death? "48 Hours" and correspondent Jericka Duncan go inside the case and the hunt for Laundrie in “What Happened to Gabby Petito?”

IN CASE YOU MISSED IT

Violent images sent to victim's family a form of "psychological terrorism," expert says

Bianca Devins, 17, was murdered by a friend in Utica, New York. Her killer posted the images of her body online and they soon went viral. But if that wasn’t horrific enough — the images were also sent to the victim’s family. In "The Online Life & Death of Bianca Devins," CBS News' Jericka Duncan goes inside the disturbing case, and looks at why what happened in the aftermath has behavioral scientists and the intelligence community concerned.