In a major piece of evidence against Indrani Mukerjea in the Sheena Bora murder case, renowned psychiatrist, Dr Yusuf Abdulla Matcheswala, who has been treating Sheena’s brother, Mikhail Bora, has told the CBI that the day Sheena was killed, her mother Indrani had asked him what dosage of a certain anti-psychotic medicine would be fatal.

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