David Muir reports on the decades-long hunt for answers in the ‘Baby Holly’ case, taking viewers inside the multistate investigation that reunited 42-year-old Holly Marie with her remaining biological family. The 20/20 full episode “Baby Holly Found” features exclusive interviews with Holly Marie, who reflects on meeting her long-lost family; her adoptive father, Phillip McGoldrick, whose story about Holly’s unusual adoption adds a new layer of mystery to her parents’ deaths; and footage of Holly’s reunion with her family.