out, but authorities are still seeking answers. randi kaye has travelled to por g gal and london years ago. and tonight she has more information on the case. please, if you have madeleine, let her come home to her mommy, daddy, brother, and sister. reporter: just hours after madeleine mccann vanished, her parents pleaded for her return. she was just shy of her fourth birthday. it was may 2007. we beg you to let madeleine come home. reporter: madeleine did not come home. and now 15 years later, prosecutors say they believe madeleine is dead and that they know who killed her. der man prosecutors hans christian walters told portuguese tv that investigators found new evidence that connects this man, christian brooker in, to madeleine s disappearance. he is a convicted rapist and