What Happened to Gabby Petito?
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[Music] Oh, she's hilarious. And she always made me laugh, always. And she's easygoing. She's like, "Hey, I love nature. Hey, camping, why not?" Oh, my God! The tent is just coming in on me. The wind is so bad. Much as I know Gabby and feel like I know Brian, you just never know when it comes to relationships. [Music] FBI agents say that they found what appears to be the human remains of Gabby Petito. Can you describe your daughter to us? She's a beautiful, free spirit. Just wanting to take a journey and have fun while she's young. She knew she wanted a van. They worked and saved up for it. They bought the van, they converted it. I love the van. And we supported her on that. All the chocolate mountains. It's a river of chocolate. Anyone that's met the two of them has been like, they seem like such a nice couple. But a lot of couples look nice on Instagram. I was concerned with them spending that much time together because when I was last seeing them and everything, they were rocky. I feel like Brian never thought that he was going to be enough. And obviously he sees the beauty in Gabby. She's gorgeous. And jealousy can turn into rage. Two people went on a trip, one person returned. That person that returned isn't providing us any information. Where is Gabby? Where is Gabby? Where is Gabby Brian? We're out here. I immediately just, where is she? Where is Gabby? Where is she? Over and over again. I mean, I immediately made like a collage of all of our photos for a TikTok and posted the information. I rushed back to the computer and lo and behold, Gabby's van was on our footage. Hey, I have a theory. I absolutely think the amazing community on social media came together and found Gabby.
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"48 Hours" goes inside the disappearance of Gabby Petito and the hunt for Brian Laundrie. CBS News national correspondent Jericka Duncan reports.