CBI sources said that Shakya was grilled as his role has been found to be suspicious. The sources said it appeared during the probe that he was apparently influencing the family in making various kinds of statements.
They said the agency has almost solved the case and it was awaiting final forensic reports from the medical board before proceeding to make arrests in the case.
The sources indicated that arrest of some family members could be made if evidence suggests their involvement.
The agency had taken into custody five accused--Pappu, Awadhesh and Urvesh Yadav (all three brothers) and constables Chhatrapal Yadav and Sarvesh Yadav.
More From This Section
The CBI had taken help of the Hyderabad-based Centre for DNA Fingerprinting and Diagnostics (CDFD) which ruled out sexual assault on the two girls.
The two cousin sisters--aged 14 and 15--were found hanging from a tree in Badaun district in UP in the last week of May, an incident that sparked national outrage with the Samajwadi Party government in the state coming under fire on the issue of law and order situation.