CBI claims that that a killer's finger print was available in the room of Arushi, was fresh without blood stains but the same finger print had smears of blood on the roof. This makes it clear according to them that Arushi was killed first and of that there should be no doubt. Hemaraj was killed with a hit on the back side of his head with at least 4 inch thick and eight inch lengh weapon (probably a hammer or a khurki ) so hard that the skull bone (which is strong) caved in. And the victim died instantly. when he was hit he will not know that he was going to be hit ,so this was planned. It was only to make doubly sure that the killers slit the throat with heavy knife so deep that the head was almost separated from torso. Killer or killers also used gloves ! at least one of them seems to have used gloves.
