Mumbai: Email exchanges of an aggressive nature between Sheena Bora and her mother Indrani Muherjea are being probed by Mumbai police to ascertain the motive leading to the former's killing, official sources said here on Tuesday.

Sometime before Sheena's gruesome murder on April 24, 2012, there were at least 20 heated email exchanges with her mother, prime accused Indrani. Investigators are hoping that these emails could provide clues to the motive leading to Sheena's killing, allegedly by the trio comprising Indrani, her ex-husband Sanjeev Khanna in connivance with Indrani's driver Shyamvar Rai.