Sheena Bora, 24, was strangled in a car in Mumbai in April 2012.
The CBI today told a special court in Mumbai that it will submit a supplementary chargesheet in the 2012 Sheena Bora murder case on October 21.
"We will file the final report on Friday," CBI prosecutors Bharat Badami and Kavita Patil told special judge H S Mahajan.
On Saturday, the agency had told the Bombay High Court that it will be filing a chargesheet in the case this week.
Meanwhile, the special court suggested a timeline for the trial, with judge Mahajan saying that CBI, if possible, could start arguments on framing of charges when it submits the charge sheet.
"The charges can be framed by next week. Entire November month will go in complying with some formalities and we can start the trial by first week of December," the judge said.
Sheena Bora (24) was strangled in a car here in April 2012 allegedly by her mother Indrani Mukerjea, Indrani's former husband Sanjeev Khanna and her former driver Shyamvar Rai.
Sheena Bora's body was then dumped in a forest in neighbouring Raigad district.
In its charge sheet filed on November 19 last year, the CBI had named Indrani Mukherjea, Mr Khanna and Mr Rai as accused in the case.
The trio were arrested in August last year after Mr Rai spilled the beans while he was being interrogated in a case pertaining to illegal possession of arms.
Mr Rai later turned approver in the case.
According to investigators, Sheena's relationship with Rahul Mukherjea, son of Indrani Mukherjea's current husband and former media baron Peter Mukerjea, was the possible motive behind her murder apart from certain financial dealings.
CBI had filed a chargesheet against Peter Mukherjea on February 16 for his alleged role in the murder plot. He was arrested on November 19 last year.
The agency had stated Sheena Bora was killed as her relationship with Rahul Mukherjea was disapproved by Peter Mukherjea and Indrani Mukherjea both of whom were part of the plot to murder her.