Police in Berlin have released the first photos of a teenage boy who claims to have lived in a forest in Germany for five years.
The English-speaking boy, who has said his name is 'Ray', walked into the city in September claiming he had been living in the woods.
A police statement said the force had released the images to find out more about the mysterious boy.
"Despite the extensive studies and investigations, the youth office and the Berlin police were still not successful in identifying the boy who calls himself Ray.
"Who knows the person shown in this picture? Who can give any information about his identity? Who can give any information about the person's possible relatives?"
Ray claims to have been born on 20 June 1994, making him just under 18. He has told police his mother died in a car crash so he and his father moved to the forest. But he said his father perished in the woods, leaving him to survive alone in the forest.
The police said they have "grave doubts" about Ray's story. A source told the Daily Telegraph in Ferburary he was a fantasist: "There was no wood, no grave, no mother who died in a car crash. He is now just regarded as something of an unfortunate."
The 17-year-old can read and write, knows how to use a knife-and-fork and speak broken German.
But police expressed their exasperation in piecing together the boy's identity, saying he had no "interest in finding out who he is."
"Whenever we want to go into details with him, he breaks it off, saying both of his parents are dead, and that no one else knows him. He seems to have an astounding lack of interest in finding out who he is."
Ray is currently being cared for by social services.