CBI sources said the agency is trying to locate Pandey who has been declared an absconder by the court on its request and is believed to be hiding.
The sources said CBI is trying to question him before filing the charge sheet to elaborate his alleged role in the encounter.
The agency has formed a special team to track Pandey and arrest him to be questioned in this regard, they said.
Pandey, as the Joint Commissioner of Police, Ahmedabad, was heading the crime branch when Ishrat, Javed Shaikh alias Pranesh Pillai, Amjadali Akbarali Rana and Zeeshan Johar were killed in an encounter allegedly with Gujarat Police on the city outskirts on June 15, 2004.
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He had denied the allegations against him and moved to Gujarat High Court seeking quashing of the FIR against him.
The high court last Friday had adjourned the hearing on a petition filed by Pandey seeking quashing of an FIR against him by CBI in the case till June 28.