Najeeb went missing on October 15 following an on-campus scuffle allegedly with the members of ABVP.
Delhi Police's Crime Branch that has been tasked with investigating the case of missing JNU student Najeeb Ahmed will be retracing the whole sequence of the incident.
The case was last week transferred from South District to Crime Branch in order to have a "fresh look" at the case.
The team, which is investigating the matter, has started from scratch and is re-looking at all the clues and evidence.
"We are examining each and every fact thoroughly again with a fresh mind and look. We will be retracing the whole sequence right from the beginning and scanning every clue that might have been missed out, and to have a fresh perspective," Joint Commissioner of Police (Crime) Ravindra Yadav said.
"If there is a lead, we will send teams wherever required," he said.
The officer said they will leave no stone unturned to trace Najeeb, who went missing on October 15 following an on-campus scuffle allegedly with the members of ABVP the night before.
"We are going through the whole range of people who might provide clues. We are working very hard. We will go in great depth to find out what happened," Mr Yadav claimed.
However, Najeeb's younger brother Mujeeb claimed that the Crime Branch team hasn't contacted them till now.
"We know that the case has been transferred to the Crime Branch. We haven't been contacted by them as of now and we don't know who is the officer investigating the case," he said.
Last month, an SIT was formed to trace the missing student following the instruction of the Union Home Minister to Delhi Police Commissioner Alok Kumar Verma.
The SIT, headed by Additional DCP-II (South) Manishi Chandra, failed to gain any actionable clues in the matter.
The team was reconstructing Najeeb's personality after a doctor at VIMHANS, told police that the student was suffering from obsessive compulsive disorder and depression.
Following this, the psychiatric angle had gained prominence in the probe. The team was also mulling seeking help from psychiatrists from AIIMS or RML to chalk out a plan for investigation in the case.
However, the Crime Branch team is investigating all probable angles, without focusing on any one perspective, sources said.
While the case was being investigated by the SIT, teams were sent to Darbhanga in Bihar and Nepal after they got leads hinting Najeeb being there, but they could not find him.