Seven-year-old Pradyuman Thakur, who was murdered at a Gurgaon school last month, could have been saved had the school authorities been careful and acted responsibly, the Central Board of Secondary Education (CBSE) told the Supreme Court today. The board found gaps in the security plan of Ryan International School and alleged that severe irregularities and safety lapses led to the boy's death. There were not enough CCTV cameras covering the campus, and classrooms not in use on the floors above were not locked, the CBSE pointed out in its affidavit.