According to a full autopsy analysis, Arunachal Pradesh student Nido Taniam died due to injuries on his head and face, reports said on Monday.
Nido Taniam, son of an Arunachal Pradesh MLA, was allegedly beaten up by some shopkeepers in Lajpat Nagar area of south Delhi when he retaliated after they made fun of his hairstyle. He subsequently died on January 30.
The autopsy report also says that his injuries were caused by a blunt instrument and severe internal bleeding led to Nido's death, according to reports.
The three men who were arrested may now be charged with murder by the Delhi Police, they added.
Delhi Police will be submitting the post-mortem report to the high court later in the day.
The Delhi high court had last week pulled up the Delhi Police for failing to submit the post-mortem report saying that infrastructure in the city for examining scientific evidence in criminal cases is at a "primitive" stage.
The HC had returned the status report filed by Delhi Police in the case and had directed it to file a fresh one along with post-mortem findings by February 7.
The high court had taken suo motu cognisance of media reports about the killing of Nido Taniam and had asked the Centre and Delhi Police to file a report on the incident.
Taniam's relatives have alleged that he was thrashed by some shopkeepers in Lajpat Nagar on January 29 after he got into an altercation with them over their remarks on his hairstyle.
Police had reached the spot and brokered a compromise after which Taniam returned to his Safdarjung home with his friends. However, he did not wake up the next morning. When his friends took him to AIIMS, he was declared brought dead.
A magisterial inquiry has also been ordered.