Chandrabhan Singh alias Chandan was strangulated to death by his coaching teacher Naeem Akhtar and his aides yesterday, Additional Superintendent of Police Rajiv Malhotra said.
The post-mortem report confirmed death due to strangulation, he said.
Following a complaint by Chandan's father, a case of murder has been registered, he said.
Naeem has been taken into custody and is being quizzed while efforts are on to nab the other absconding accused, he added.