From the very beginning of his recruitment, David displays his eagerness to kill by attempting to kill Tobias after morphing into a golden eagle (though in this case, he is under the control of the eagle's instincts). He also does not seem concerned enough about his parents being Controllers. It is only through Marco showing him that his parents are now indeed Controllers that it finally resonates with him. On the way to the Marriott resort, David indiscriminately kills a crow, although he passes it off as his morph's instincts taking control.