Hello all! I just need some quick advice on a character arc. Here's what I have so far. My main character is an FBI agent who is placed on a case to track down the murderer of an informant interested in providing information on organized crime. His major weakness is his desire to gain the approval of others as a form of self validation, specifically through his boss. This weakness presents itself fully when he is taken off the case by his boss, who instead gives the case to his rival. Going to confront him in his first true assertive act of the story, he accidentally kills his rival in a fit of rage and covers up the murder to protect himself. He elects to pursue the case through any means, including illegal ones, in an attempt to prove his worth both to himself and his boss. Along the way, he grows in confidence as he takes increasingly assertive acts, eventually overcoming his need for approval and gaining a new perspective on just who he is. Of course, this isn't the entirety of the story, but really the central conflict. I suppose the question I pose to all of you is regarding the nature of his arc. Does it seem consistent and is it a believable story change? Also, if the arc is lacking in any way, what arc would you give my protagonist that explains why he would kill his fellow agent and pursue the case? If you need any more context, feel free to let me know and I can provide. Thanks!