Mikhail Bora, the son of Indrani Mukerjea was on Thursday interrogated by Mumbai Police at the Dispur police station.
Earlier , Mikhail had revealed that he had evidence to prove that his mother was responsible for his sister's murder.
"I have some evidence concerning the conversation between Sheena and Peter Mukerjea. And I also have some pictures as evidence. If the police come to me today, I will give the evidence right away," he said.
"I will do everything I can to help in the investigation," he added.
Mikhail also said he had come to know of Sanjeev Khanna, Indrani's second husband, through the media.
