Sources said the CBI team grilled Vanzara about the allegations which he had levelled against Narendra Modi and his aide Amit Shah.
Almost a fortnight after he wrote an explosive resignation letter to the Gujarat government, suspended IPS officer and an accused in a series of fake encounter cases, DG Vanzara was questioned by the CBI team at the Sabarmati jail in Ahmedabad on Friday.
Sources said the four-member CBI team grilled Vanzara about the allegations which he had levelled in his letter against Chief Minister Narendra Modi and his key aide Amit Shah.
Sources also said that he was questioned in connection with other encounter cases as well. However, the details about what Vanzara told CBI officials are still unknown.
Vanzara, 59, who has been in jail since 2007 for a series of fake encounters, wrote a 10-page resignation letter earlier this month in which he said that the Gujarat government and Amit Shah were aware of the actions of senior police officers like him, who are accused of killing college student Ishrat Jahan, and petty criminals Sohrabuddin Sheikh and Tulsiram Prajapati.
Vanzara said he "adored Mr Modi like a God" but the Chief Minister was misled by Mr Shah's "evil influence." Amit Shah, an accused in the murders of Sohrabuddin and Tulsiram Prajapati, is out on bail.
Saying he felt "ditched and disowned", Vanzara urged that Mr Modi, "In the hurry of marching to Delhi, may kindly not forget the debt he owes to jailed police officers who endowed him with the halo of Brave Chief Minister."
Vanzara said officers like him "simply implemented the conscious policy of the Modi government which was inspiring, guiding and monitoring their actions from very close quarters."