He is exhausted and dirty and one jutsu away from chakra exhaustion when he finds the body. It lays face-up at the curve of the river which runs from a waterfall only a short distance outside of Konoha. It 's obvious that the young man has gone down the falls. It 's even more obvious that he had been the victim of an attack before doing so.

The sockets where his eyes should be are bloody and empty, lids falling concave inwards. His dark hair fans out in the water that is gently rocking him against the shoreline, a curly halo of ink. By his face it would be obvious that he is an Uchiha even if Kakashi had never heard of Shisui. They have never met directly but tales of the fair-minded smiling Uchiha have reached him even behind his porcelain mask.