Muthu Krishnan (28), an M Phil student at JNU's Centre for Historical studies, had hanged himself from a ceiling fan at his friend's residence in South Delhi's Munirka area on Monday.
The five-member medical board constituted to conduct the autopsy, in its preliminary report, has stated that the death was due to hanging and no injury marks were present on the body.
"The death was due to asphyxia (a condition of severely deficient supply of oxygen to the body due to abnormal breathing) as a result of ante-mortem hanging. No injury mark has been found in any part of the body," Dr Sudhir Gupta, Head of AIIMS Forensic Department, told PTI.
The body of the JNU research scholar was embalmed and handed over to police, he said, adding the autopsy procedure was videographed.
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Meanwhile, police have registered a case of abatement to suicide in the death of Krishnan.
"We have registered a case of abatement to suicide under relevant section of The Scheduled Castes (SCs) and the Scheduled Tribes (STs) Prevention of Atrocities (PoA) Act. The case has been registered against unknown persons," a senior police officer said.
Krishnan's father had sought a CBI probe claiming that his son cannot commit suicide.
"My son cannot commit suicide. He was very strong and confident. We want a CBI probe to be conducted and actual reason behind his death be revealed," Krishnan's father, Jeevanandam, had said.
Following their demands, the medical board was constituted.
Krishnan, who had named himself 'Krish Rajini' on Facebook, was at the forefront of a students' movement following Rohith Vemula's suicide.
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