A 12-member Central Forensic Science laboratory (CFSl) on Saturday visited premises of Gurugram's Ryan International School in Bhondsi where the body of seven-year old Pradhuman was found with throat slit on September 8.
The team will collect forensic evidence and documents and make an attempt to recreate the crime scene of the day Pradhuman, a class 2 student, was killed.
The CBI has also started interrogating the school bus conductor Ashok Kumar, prime suspect in the killing, regional head of the school group Francis Thomas and HR head Jeyus Thomas after taking them into custody.
At the school, the forensic team checked the crime spot from all angles and picked up finger prints, and other samples from the washroom.
They also inspected the entire premise of the school including the washroom where a murder took place. The CBI officials also questioned the teachers in connection with the case.
Gurugram Deputy Commissioner, Vinay Pratap Singh also held a meeting with parents of the school and detailed discussions were held regarding the arrangements and measures being taken by the school management with regard to improving the security and safety measures.