According to Mumbai Mirror report, when Peter Mukherjea met Indrani in Byculla jail in October 2015, she told him that she had been framed and she had done nothing.
These revelations were made by Peter's brother Gautam Mukerjea and his sister Shagun Mukerjea.
"There are over 250 witnesses in the case but not one statement indicts Peter. He was as taken aback by these disclosures about Indrani as anyone," Gautam was quoted as saying in the daily.
Rahul Mukerjea was also allegedly facing threat from his step mother Indrani which he had conveyed to his father Peter Mukerjea through an email sent about a year before the murder of his girlfriend Sheena Bora.
CBI which is probing the murder of Bora has attached this conversation in the supplementary charge sheet which mentions that Peter knew that his wife Indrani has allegedly issued threats to his son Rahul and her daughter from her first marriage Sheena, sources said.
Fearing threats, Sheena and Rahul had taken a backup of all the mails, messages, documents for safekeeping, they said.
In the mail dated April 13, 2011, Rahul told Peter, "On several occasions, we have received threats from Indrani...I have protected myself and Sheena by documenting mails, history, conversations and messages included." He wrote that he had put these for safekeeping and threatened to make them public "should anything happen to either Sheena or me", the mail alleged.
CBI has alleged that Peter was actively involved in the conspiracy to murder Sheena which was hatched by Indrani, her second husband Sanjiv Khanna and driver Shyamvar Rai who all have been arrested by the agency.
(With inputs from agencies)