In a major development in the CBSE paper leaks case, the police has arrested three people, two teachers and a tutor from outer Delhi for allegedly leaking the Class 12 economics paper. Police said WhatsApp was used to get the paper from the exam centre to the students. What provided the breakthrough was the location code, which was in the corner of the leaked paper, the images of which was circulated on WhatsApp. Location code indicates which school the paper has been sent to and the police tracked it to zero in on the school. The CBSE cracked down on an official on Sunday, suspending a supervisor of the exam centre where the leak took place. But is this enough?