Honestly speaking, aside from Xia Fei being a bit of lunatic in how he acted and how he did not care for the rules of the world around him, it was not as if he had not done any good deed in his life. In fact, not too long ago, he had indeed done one such good deed when he saved the young miss of the Mu Family, Mu Fuping, from the hands of an assassin.
Unfortunately, such an incident was difficult for the masses to learn about. Instead, what the entire Law Realm came to know was when he became a suspect for slaying his family patriarch and became wanted by the Law Enforcement Board.
Life was just that funny; Mu Fuping came from one of the distinguished Nine Great Clans, and if anything were to happen to her, even all the lives of the Yu family would not be enough as payback. Going by that logic, Xia Fei saving Mu Fuping's life should most definitely be more important than him being suspected of murdering Yu Jiang.