Is the abduction of Chibok School Girls a political scam?

Some section of Nigerians are of the opinion that no Chibok school girls were abducted. They claim it is a political scam. Does this picture above/below prove anything? Is the girl seen on the picture who was arrested while attempting to detonate a suicide bomb same as the one later rescued as one of the Chibok school girls?

Do they look alike? Is she the same person?