In Arushi murder case, a Ghaziabad court has given nod to Central Bureau of Investigation to conduct narco analysis test on Aarushi's parents Rajesh and Nupur Talwar. CBI had approached the court to conduct narco tests on them. <br/>Arushi was found murdered in May 2008 along with the family domestic help Hemraj. Suspicion had fallen on her father Rajesh, who was jailed by the Noida police for around 50 days.<br/>The investigating agency, which has re-constituted its entire investigating team to probe the case, had earlier taken a written permission from the Talwars for conducting the tests on them.<br/> Narco analysis involves psychotherapy which is conducted while the patient is deeply sedated with medication so that inhibitions are reduced and responses more truthful.