The investigation into the murder of a Class 10 student outside Seventh Day Adventist School in Khokhra has widened, with the Detection of Crime Branch on Friday registering a case against the school’s principal and management for failing to promptly alert the police or the victim’s family after the incident.The action follows a written complaint by the victim’s father, who alleged that there was an inordinate delay in informing authorities. The Commissioner of Police had earlier transferred the probe to the Crime Branch for a detailed investigation.According to investigators, Principal Dr G Immanuel and three teachers were among the first to be informed about the stabbing. The probe has revealed ‘serious negligence’ on the part of the school authorities, who neither provided immediate medical assistance nor informed the police or the family promptly.“Around 45 statements have been recorded so far. In their depositions, staff members have been blaming one another, but no one stepped forward to help the injured boy. The CCTV footage corroborates this,” a senior officer said.The incident took place on August 19, between 12.30 pm and 12.45 pm, when the victim, a minor, was attacked with a box knife near the Meladi Mata temple opposite the school. The accused, also a minor and reportedly a cousin of another student, fled in his school van and later returned home without disclosing anything. He even went ahead with his tuition classes the same evening, police said.