She has also accused the Gujarat government in the letter of using all possible ways to deny bail to her husband.
Shweta, wife of Bhatt, had written her first letter to Chidambaram a couple of days ago saying that there was danger to the life of the IPS officer from the "vindictive administration". In her second letter, she has said that her husband was being treated like a terrorist despite he not being a serial offender nor a criminal.
She said in the letter that she has just come to know that Bhatt was kept in a dingy, filthy, stinking room in the city crime branch lock-up on the day he was arrested.
She further alleged he was kept in the room with hardened criminals without food and water.
Shweta has also enclosed the CD which according to her contains video footage purportedly showing how Bhatt was being "ill-treated".
She has also expressed apprehensions about more false cases being concocted against her husband. She once again raised the point of safety of her husband saying "I am terribly concerned about the life and liberty of my husband."
She said looking at the treatment given to Sanjeev so far Gujarat police could go out of the way to victimise her husband further.
In the letter she has also complained about how Gujarat police used derogatory and insulting language while conducting searches at her residence after Bhatt's arrest.
In an affidavit filed in the Supreme Court Bhatt had alleged that Modi had asked the police at a meeting after the Godhra train burning incident to allow the majority community to vent their anger against Muslims.