FBI takes items for 'matching' Brian Laundrie's DNA, family attorney says

Agents with the FBI were at the home of Brian Laundrie's parents Sunday to request personal items they could test and match for DNA, according to the Laundrie family attorney. It's unclear what prompted the request, on the eighth day of the search for Gabby Petito's fiancé.

Gabby Petito story boosted by social media and true-crime craze

Whether the frenzy of attention and internet sleuthing has helped the Gabby Petito investigation is not clear, but it has illuminated the intersection between social media and the public's fascination with true-crime stories.