In a new twist to the Aarushi murder case, the CBI has sought permission to carry out narco analysis tests on parents of the teenager. An application in this regard was moved a week ago before a special CBI court in Ghaziabad seeking permission to conduct the tests on the dentist couple, Rajesh and Nupur Talwar. 14-year-old Aarushi Talwar was found murdered in her Noida house on May 16, 2008 under mysterious circumstances. <br/><br/>Satish Tamta, counsel for Talwar said an application was moved by the CBI for narco analysis and both of them have given their consent. Narco analysis involves psychotherapy which is conducted while the patient is deeply sedated with medication so that inhibitions are reduced and responses will be more truthful. Incidentally, Rajesh, who was arrested by the Noida police, was let off after the CBI gave him a clean chit. The case has had it own twists and turns with the CBI yet to make any breakthrough. The agency had recently re-constituted the entire investigating team probing the case. The CBI had earlier alleged that Krishna, Vijay Mandal and Rajkumar, all domestic helps, were accused in the double murder case but are yet to file a chargesheet against them.