evidence: The protesters were seen hurling stones at the police force who protected themselves using shields. Police fired gunshots into the air and brought the situation under control. "Even when police were injured, they did not react," Babu said. "Those responsible for the girl student’s death and for not ensuring enough security in the hostel will be brought to book. We have arrested the school’s correspondent Ravikumar, secretary Shanti, principal Sivasankaran. For further investigation the case has been shifted to the CB-CID," the DGP said.