Indrani had introduced Sheena, her daughter from an earlier marriage, in Mumbai social circles as her younger sister.
In a statement recorded last month, Rahul, the son of former media baron and Sheena's step-father Peter Mukerjea who is also an accused in the case, said that Indrani constantly kept changing her story about Sheena's "disappearance" after her murder.
The copy of the statement was made available to defence advocates today.
Rahul, who used to stay with Sheena in a rented flat, also stated that in March 2009, just before Indrani and her colleague visited his flat at Khar in Mumbai, Peter had told him that Indrani was coming to his place and that she wanted to separate them. "Later Indrani came and took Sheena away," he said.
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Two months later, Sheena contacted him and said that she was in Bangalore, he said.
"One day Kaustubh even hit a beer bottle on Sheena's leg," he said.
According to Rahul, Sheena had told him that from the joint bank account (of Indrani and Sheena) Rs 15,000 had been withdrawn (which Sheena had not) and her mobile had also been disconnected.
"In 2012, Sheena wanted to complete her further studies and was in need of funds and hence she resumed communications with Indrani," he said.
Worli in south Mumbai and did not find Sheena there, he approached the police.
"Police told me that if Sheena had gone with her mother, she would soon return. They also asked me not to worry and also that we were not yet married," Rahul said.
He also said that Indrani kept changing her story (about Sheena) constantly.
Rahul said that he also met former Inspector General of Police Paramvir Singh and Sheena's superior in Mumbai metro Shubhodoy Mukherjee, who advised him to file a missing person's report.
He said that police were unwilling to take the missing person's complaint.
Indrani (43), her former husband Sanjeev Khanna and her ex-driver Shyamvar Rai have been charge sheeted in the case. Peter, 59 was arrested on November 19 for his alleged role in the murder case.