First, lawyers are proficient in laws and regulations, including substantive law and procedural law, as well as criminal law, and have the ability to investigate cases. Not only that, lawyers have developed the habit of thinking from a legal point of view, and can properly link the specific cases in front of them with legal norms, put forward some objective and convincing claims through legal reasoning, and prompt them to the court in time.
Second, lawyers can organize arguments and evidence materials in favor of clients according to specific cases on the basis of knowledge of laws and regulations and legal reasoning ability, and conduct a logical and complete debate, which is not necessarily directly related to lawyers' beliefs or likes and dislikes.
Third, lawyers are familiar with legal practice, especially the practical affairs of litigation. To become an excellent lawyer, it is often after handling a large number of cases repeatedly that you gradually master various procedural skills. This is not only a question of knowledge, but also experience and skills. This is obviously not available to the parties.
Fourth, as far as the connection with the case or the dispute itself is concerned, the parties themselves are direct interested parties, and often they can only look at the lawsuit from their own subjective standpoint, while lawyers can keep a certain distance and grasp the situation objectively and calmly because the case belongs to others in essence.
Fifth, lawyers, as professionals, are subject to special ethical norms of professional groups. Although he and the judge are both engaged in the legal profession, lawyers are not attached to the judiciary after all. He participated in the lawsuit in an independent position.
It is difficult to judge the influence of lawyers on criminal cases, but the value of lawyers must be based on the interests of the parties and strive for the greatest favorable conditions and judgments for the parties.