Chaudhury and three witnesses, in whom the victim had confided about what transpired between her and Tejpal at a five star hotel on two occasions when he allegedly sexually assaulted her, may be called to record their statements before a magistrate.
"We have sought permission from the court to summon Chaudhury and three witnesses to record their statements before a magistrate," a senior crime branch officer said.
Chaudhury's statement is "very crucial" as she was the first person to have come to know of alleged sexual assault on the young journalist by Tejpal.
Any statement or confession recorded by a metropolitan or judicial magistrate under section 164 of CrPC is admissible as evidence in a court.
The crime branch officer said the four would be called after court gives a date for recording their statements.
At a press conference today, the Chief Minister said the police would file the chargesheet in one to one-and-half months in the case but ruled out political interference in the investigations.