Vanzara, who is lodged in Sabarmati jail after CBI named him as main accused in the 2004 Ishrat Jahan fake encounter case, was quizzed about the contents of his resignation letter in which he has also faulted Gujarat Chief Minister Narendra Modi.
Vanzara (59), an officer of the rank of Deputy Inspector General of Police sent his resignation letter on September 1. In his letter, he expressed bitterness over the way the Modi government had failed to stand by him and other officers who implemented the government's "conscious policy" of "eliminating terrorism".
"By adopting such a suicidal path, this government, I am sure, is doing nothing else but is hastening and facilitating its own death by drowning."
The CBI questioned him about the "tactics", as alleged by him in his resignation letter, used by Shah when he was the Minister of State for Home, agency sources said.
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The IPS officer was then considered to be close to Modi. In particular, his letter accuses former Minister of State (Home) Amit Shah of betraying him and 32 other officers who are now in jail in connection with various encounter cases from Gujarat that CBI is probing.
Vanzara says in the letter that he once adored Modi as a 'God', who could not rise to the occasion under the "evil" influence of Shah.