American Tragedy: Update

From the outside, Gabby Petito and Brian Laundrie seemed to be the happiest of couples as they drove across America, sharing their adventures on social media. But in Utah police noticed something was wrong when they pulled them over and saw them arguing. Weeks later Gabby was dead, and weeks after that, so too was Laundrie. He was found with a note confessing he'd murdered his fiance. How this American tragedy could happen has intrigued the world, and now another chapter. Gabby's family is suing the police officers who first stopped the couple, claiming they failed the 22-year-old in her most desperate time of need.

Reporter: Sarah Abo