Mumbai, Aug 28 (IANS): In a significant development in the Sheena Bora murder case, the Mumbai police have traced the person who had sent a resignation letter on her behalf - and at the behest of her accused mother Indrani Mukherjea - to her employer, weeks after she was brutally killed and her body disposed off, Police Commissioner Rakesh Maria said here late Thursday.

The same person also sent a mail to her landlord foregoing her lease and licence agreement on a rented flat, he said.

In a brief interaction with the media, Maria said that during the investigations, police found that a letter of resignation to her employer and another letter to the landlord were sent on Sheena's behalf after her death.

"We have traced and recorded the statement of a person who had sent the emails to her employer and landlord (cancelling the lease and licence rights of her rented flat). The person concerned has signed on behalf of Sheena Bora, at the behest of the lady accused (Indrani Mukherjea)," he said.

"The resignation letter was sent to her employer company on May 7, 2012, while the letter to her landlord sometime in July, 2012," Maria said.

Both these mails were sent after the death of Sheena, who was strangulated allegedly by her Indrani with the help of the her ex-husband Sanjeev Khanna and her driver Shyam Rai, on April 24, 2012.

Sheena was employed as an assistant manager with Mumbai Metro One Pvt Ltd since June 20, 2011. She had taken leave of absence from her work, on April 24, 2012, the day she was killed, as she wanted to meet her mother.

Maria added that the probe in the sensational murder case progressed at a "brisk pace" on Thursday, but declined to reveal other details.