Here are the 10 latest developments in this story:
Ms Mukerjea was rushed to hospital on Friday afternoon from the Byculla women's jail after she complained of "uneasiness". Doctors attending to her say they are investigating whether she overdosed on prescription drugs. JJ hospital doctors have been provided prison records which showed that Ms Mukerjea was allegedly taking anti-epilepsy medicines since September 11.
"Indrani Mukerjea is in deep sleep and her respiration is depressed. She is being given oxygen. In respiratory depression, we can talk of chances of survival only after 72 hours," TP Lahane, the Dean of JJ Hospital has said.
Ms Mukerjea collapsed at the Byculla jail around 6 am on Friday. Sources say she got up at 5 am and read the Bhagavad Gita. She was moved to JJ hospital after resident doctors at the jail failed to revive her.
"We think she has consumed some tablets, we are treating her on that basis," Dr Lahane had said yesterday. Today he said reports so far have ruled out overdose, but added that more test results were awaited.
According to senior police officials, Ms Mukerjea was being given two tablets - one anti-anxiety and one anti-epilepsy, every day as prescribed by a psychiatrist at JJ hospital.
"The pills were prescribed on September 11 and she was supposed to take them from September 12 to 26," Inspector General (Prisons) Bipin Kumar Singh said. The probe will seek to ascertain whether she had accumulated the pills beyond the prescribed limit, he added.
Indrani's mother Durga Rani Bora died in Guwahati on Thursday evening. She was 82. No one from her family visited Ms Mukerjea at the hospital last night.
Ms Mukerjea, 43, was arrested in August and has been lodged at the Byculla jail since September 7 when she was remanded in judicial custody.
Sheena Bora, 24, was killed in 2012. The Mumbai Police has accused her mother, Indrani, step-father Sanjeev Khanna, and a driver of hatching a criminal conspiracy to murder Sheena, abducting and murdering her and disposing of her half-burnt body in a forest in Raigad, about 80 km from Mumbai. During her lifetime, Ms Bora was presented by her mother as a younger sister.
Mr Khanna, a Kolkata businessman, and Ms Mukerjea's driver were also arrested and are lodged at the Arthur Road Prison. Ms Mukerjea's husband, Peter Mukerjea, a former CEO of Star India, has been questioned several times by the police in the case.
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