Special CBI judge Gita Gopi posted the hearing on Vanzara's application on February 12.
"Vanzara has applied for regular bail. The main argument put by us for bail is that the CBI has relied on the statement of witnesses who were earlier accused in the Ishrat Jahan fake encounter case," said Vanzara's counsel V D Gajjar.
In its charge sheet in the encounter case last year, the CBI had named IPS officer G L Singhal, suspended IPS officers P P Pandey, Tarun Barot and N K Amin besides Vanzara. The agency had also named retired DSP J G Parmar and commando Anaju Chaudhary.
The charge sheet said the encounter was fake and carried out jointly by Gujarat Police and IB.
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The agency had said investigation in the case was going on and it will file a supplementary charge sheet once it is over.
Along with the charge sheet, the central agency had also attached statements of witnesses, who were working as police officers under Vanzara and others.
Vanzara (59), a former DIG, was suspended for his alleged involvement in a string of fake encounter cases.
He had resigned from IPS on September 1, 2013 accusing Narendra Modi government of having failed to protect the interest of policemen jailed for encounter deaths while they are implementing a "conscious policy" of Gujarat government for eliminating terrorism.