The video, not publicly released but seen by some reporters, showed Pradyuman, 7, crawling out of the school's bathroom seconds after his throat had been slit. He collapses near a wall outside, his blood puddling around him. The same camera had recorded the bus conductor, Ashok Kumar, entering the bathroom before the child went in.
He emerges first. The child follows, holding his neck. His windpipe had been slashed open. He died within minutes.
The CBI today said that the CCTV that the police referred to was just a part of the available video. Sources in the premier investigating agency, which took over the case last month, say that the Gurgaon police committed many errors. Among them, the fact that the extended video shows five people outside the bathroom - an injured Pradyuman, three students and the bus conductor.
The Gurgaon police said that Ashok Kumar, the conductor, who was employed by a private firm that operated schoolbuses, had used a knife from his toolkit to slit open Pradyuman's neck when he resisted sexual assault in the bathroom. The police also claimed that Ashok Kumar had confessed to the killing.
The CBI says that a search of the toilet led to a knife that had been flushed down a pot and that the Class 11 student had been seen with the same knife in school before the murder. The student also allegedly told classmates that their exams would be postponed. CBI sources say the teenager was in counselling and academically week and that he believed the crime would delay exams and a parent-teacher meeting.
A CBI spokesperson said that while the student had planned a murder, he had "not identified the target" and chose Prayudman upon encountering him in the toilet.
His father has denied the accusations, stating that the teen "had not one spot of blood on his clothes" and is being framed. Ashok Kumar's family says the same.
Pradyuman's father, Varun Thakur, said that he never believed the Gurgaon police's theory about the conductor and feels the CBI has cracked the case.