Sibal said call records show that an OSD in the chief minister's office, Parag Shah, was in constant touch with suspended IPS officers D.G. Vanzara and Rajkumar Pandian.
Shah was an OSD in Modi's office between 2003 and 2008.
"I am just producing documents before you (journalists), I want to know why this investigation has not bee carried forward," he added.
