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."
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.
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Peter was also told by Rahul that he was not sure if messages coming from his father's phone were actually sent by him or not.
Rahul had accused his father of allegedly using the email accounts of Indrani and Khanna's daughter Vidhie to send mails to Sheena, it alleged.
and also pressuring a media company where he was trying.
"After all the things your wife has said about me, and all the threats she has made, and after all the attempts she has made to disrupt my progress, telling a load of lies about me and trying to have me thrown out from my flat. Then also pressuring the (media company) people," he had told Peter in his mail which has been attached by CBI in the charge sheet.
CBI had mentioned in the supplementary charge sheet that both Peter and Indrani wanted separation of Rahul and Sheena who were in a relationship.
"We have mentioned in the charge sheet that the process of separating Sheena and Rahul had started since 2009 and as they did not budge, the duo (Indrani and Peter) planned to kill her," a CBI official said.
Peter was arrested on November 19 for his alleged role in the murder conspiracy. He was in CBI custody for two weeks. Indrani is the prime accused in the case.
On November 19, CBI had filed a charge sheet against Indrani, Khanna and Rai for murdering Sheena and disposing of her body.
Sheena (24), Indrani's daughter from an earlier relationship, was allegedly strangled in a car by Indrani on April 24, 2012 and her body was burnt before it was dumped in a forest in adjoining Raigad district.