I dont think their narco analysis is good enough, reserved category doctors and professionals would be doing this and that is the reason why even illiterate people like these servants are able to lie even after taking the truth serum. CBI is using these tests to cover up what actually happened. I can understand a 14 year old getting murdered without making any sound but how can they expect us to believe that hemraj silently went up with them to the terrace when they dragged them and never made any sound, even the sacrificial lamb creates enough sound when he sees the knife, forget Talwar not getting up....slitting hemrajs throat on top of that 1000 feet flat would have made neighbors half a block away awake. This is all a sham and probably being done to save talwars.
