New Delhi:
The CBI has drawn a blank during narco-tests conducted on parents of Aarushi - Nupur and Rajesh Talwar - as it failed to get any concrete clue which could help investigators in solving the murder case of the teenage girl.
The CBI had carried out narco-analysis test on Nupur Talwar between February 8 and February 12 and on Rajesh Talwar between February 15 and 20.
The agency had already conducted brain mapping and lie detector tests of the Talwars in 2009.
"No concrete evidence could be collected even after conducting the narco-test of the Talwar couple that could help in further investigations in the case.
"The test was conducted to find out if Nupur Talwar or Rajesh Talwar knew anything about the case, but they knew nothing different," a forensic scientist with the Gujarat Forensic Sciences laboratory said.