Police have registered a case against school manager Brijesh Yadav, principal Rashmi Bhatia and sports teacher Abhishek Kannaujia under sections 376D (gangrape), 302 (murder), 201 (causing disappearance of evidence of offence, or giving false information to screen offender) and 120B (criminal conspiracy) of the IPC and under the Protection of Children from Sexual Offences (POCSO) Act.