Madeleine McCann Missing: Family Believes Girl Still Alive, Scotland Yard Launches New Investigation We're going to turn to the cold case gaining some heat. It involves a little girl's face you'll remember. madeleine McCann, disappeared from a resort where her family was vacationing in 2007. Her parents never gave up hope and neither did police. They've reopened the case. And lama hasan is in london this morning with late details. Lama, good morning. Reporter: Good morning to you, david. Not only has scotland yard reopened the case, with new leads and persons of interest, across five european countries. But detectives n believe that LITTLE madeleine McCann may still be alive, six years after she vanished. These are mine. Reporter: This morning, a stunning twist in the hunt for madeleine McCann, in what could be a big breakthrough in solving the mystery behind her disappearance. There's no clear, definitive PROOF THAT madeleine McCann is dead. On that basis, I believe there's a possibility that she's alived. Reporter: For the past two years, investigators have reviewed more than 30,000 documents related to the case. Now, scotland yard is launching a new investigation, after uncovering new findings and new witness evidence. We have identified 38 persons of interest. And within that, 12 who are u.K. Nationals. Reporter: They released this computer-generated image of what she would look like today. KATE AND gerry McCann were on vacation in portugal, in may 2007, when 3-year-old madeleine and their twins. The couple left their children in the hotel room while they dined with friends in a nearby restaurant. When they returned, madeleine was gone. Please, if you have madeleine, let her come home to her mummy, daddy, brother and sister. Reporter: Almost immediately, the McCanns became suspects. But eventually were cleared. They are not persons of interest or suspects. They are parents who have lost their daughter. And we're doing all that we can to bring resolution for them to find out what has happened to madelei madeleine. Reporter: But since her disappearance, there's been dozens of false madeleine sightings, from india, to morocco, to belgium. The portuguese police closed the case when it went cold, as part of the country's criminal justice system. They cannot reopen it. And the judge is con there is enough evidence. This scotland yard investigation may be the last chance, last hope to finding out what happened to their daughter. Lama, thank you. So many people all over the world rooting for those parents and hoping to find little madeleine.