Theodorus Komnenos

Theodorus Komnenos was a wealthy nobleman in Constantinople during the Renaissance.

Biography
Despite having conquered the district, the Assassins soon discovered that the Templars still had a large amount of influence over the merchants. As they investigated, they discovered that the merchants had been paid bribes, and that the money had come from Theodorus Komnenos.

They decided to seek Komnenos out, who started panicking once he became aware of the Assassins. He quickly admitted that he had been corrupted by the Templars, but that he was a good man at heart. Not too long after that, he offered to guide the Assassins to Odai Dunqas, his superior and the man behind the bribing of the merchants.

As Komnenos reached Dunqas, he was offered a permanent appointment in Alexandria. Komnenos, stressed due to the knowledge of the Assassins, betrayed their presence and admitted they had followed him. Dunwas, enraged by this news, killed Komnenos by stabbing him in the chest, before fleeing from the Assassins.

Source

 * Assassin's Creed: Revelations