Molly Francis, principal of the school, said that the block supervisor spotted something suspicious about the signature of the student. “He alerted me saying the signature did not match the one on the hall ticket. When I took a closer look, I realised even the picture on the hall ticket was different. I told the constable, who questioned the boy. He confessed immediately. The student, whose hall ticket it was, was waiting outside the school and the police caught him too,” Francis said.