Itachi killed everyone, and Sasuke walked in on him.
Cops were not on the way (Uchihas were the cops after all), but he's not staying around till someone comes around.
Hokage would have spread the word already. Itachi's corpse would have been missing, and the village would have needed to find the one responsible. If no one from the village did it, then they would have needed to direct their suspicions at other villages, which defies the point of killing the Uchihas to maintain village stability and well-being.Originally Posted by deadlydreamx