An image of how Madeleine McCann may look now, if still alive, was released by her parents today as they vowed to continue the worldwide search for their daughter. Gerry and Kate McCann employed a forensic imaging artist to produce a photographic impression of how the missing youngster would have aged in the two years since she vanished from the family's holiday apartment in Portugal. It will be used on posters to be distributed globally and the couple believe it could prove ``crucial'' in finding out what happened to her.