Party, two murders, all happenig in a house (remember house not a fort), parents slleping in one bed room, and they didn't listen anything. Dr. Talwar has taken some drinks/pills, what about mother? Everybody knows, mothers are very sensitive. Even a slight disturbance and they wake up! It is god gifted to mothers, that's why God has given the duties to take care of children. How it is possible that Aarushi's mother's sleep is not disturbed. Enough CBI, leave the case as it is and let the dead take rest in their souls.