Shisui Uchiha was feared as Shisui of the Body Flicker. He was one of the most talented of the Uchiha Clan. He was best friends with Itachi, and because of that Itachi drowned him to gain his own Mangekyou Sharingan. He was found drowned in a river in what appeared to be suicide. It was later revealed that he had been ordered to keep tabs on Itachi. Itachi used his sharingan to forge a suicide note. Itachi revealed this to Sasuke during their battle.