A Special CBI Court on 12 August adjourned the hearing in the high-profile Sheena Bora murder case for two weeks.
The CBI has to respond within two weeks as to when it would finish the probe in the case.
The matter was adjourned after the investigating agency said that it had sent Letter Rogatory (LR) to three countries - US, Singapore, and Hong Kong, seeking bank account and transaction details of Peter and Indrani Mukerjea to establish a money trail.
Stating the response on the Letter Rogatory is still awaited, the CBI said once these responses are received, they would prove helpful in this case.
Earlier on 1 August, the court had extended the judicial custody of the accused till today.
The Special CBI court had last month adjourned the hearing on Peter Mukerjea's application, which sought the statement of witness number 32, till 20 July.
The central agency had in its supplementary charge sheet filed in February submitted the statement of an unnamed witness in a sealed cover.
The CBI had said they are not revealing the identity or the statement of the witness as the investigation was going on.
The special court earlier on 1 July gave copies of Shyamwar Rai's confession to co-accused Sanjeev Khanna and others on the Bombay High Court's directive.
The High Court had earlier on 4 July extended the judicial custody of Indrani Mukerjea, Khanna, and Peter Mukerjea till 18 July.
Indrani, Khanna and Shyamwar Rai had allegedly strangled Sheena Bora, Peter's daughter from an earlier relationship, inside a car in April 2012.
The trio was arrested in August last year, while Peter was arrested in November.
Sheena's body was found in a forest in Raigad. The crime, which came to light in August last year, is allegedly linked to certain financial dealings.