Narco Analysis Test started in America and banned that country after 10-12 years of invention. It is not a perfect route to find the truth. It is very dangerous test and 99% countries in the world, banned the same. If a person having strong will power and mentally very sound, decided to say lie only, then no tests in the world can disclose the truth from him/her. What CBI doing? Very shame! Nothing happen!! Like Nithari(Noida) case....Very bad!!!