"No one, be it the roommate or the family of the student or nine suspected students, appears to be happy with the manner in which the investigation is being carried on," a bench of Justices G S Sistani and Vinod Goel said.
The observation came during the hearing of a habeas corpus plea moved by Najeeb's mother seeking a direction to the authorities to trace her son who is missing since the night of October 14-15 last year.
Mehra said the nine students are not being singled out for the polygraph test and the submission was taken on record by the court.
This was stated during the hearing of an application by one of the nine students who has challenged a Delhi Police notice asking him to appear before the trial court to give consent for the test.
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The high court was today told that the matter in the trial court has been adjourned to February 22.
Thereafter, in view of the submission made by Delhi Police, the bench listed the matter for further hearing on March 16.
On February 13, the court had said it was "foxed" by the lack of information about Najeeb's whereabouts even after five months of his disappearance as his family sought that the probe be handed over to some other agency.
27-year-old Najeeb has been missing since October 14-15 last year after a scuffle at his JNU hostel allegedly with ABVP activists the previous night. The RSS students' wing has denied any involvement in his disappearance.
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