'Get us out of this horrible mess': Brian Laundrie's sister pleads for him to surrender to police

assie Laundrie said she has a message for her missing brother, who has been the center of a nationwide manhunt after the body of his girlfriend, Gabrielle "Gabby" Petito, was found in Wyoming last month. "I would tell my brother to just come forward and get us out of this horrible mess," Cassie Laundrie told ABC News in an interview that aired Tuesday on "Good Morning America." READ MORE: https://6abc.com/brian-laundrie-gabby...