What organ should I look for when I am wronged?

First of all, this is a criminal case. According to the relevant provisions of the Criminal Procedure Law of People's Republic of China (PRC), there is only one jurisdiction over a case, that is, the local public security organ. Only when the public security organs solve the case and find out the truth can your brother be cleared. This is the foundation. Therefore, as a relative of the suspect, it is the most correct way to cooperate with the public security investigation. If you think the detective's behavior is improper or even illegal, you can report it to his leader or superior department and order him to correct it. If the public security organ violates the law and discipline, it may appeal to the people's procuratorate, the Standing Committee of the National People's Congress, the Political and Legal Committee, the party's supervisory organs and the media to seek news supervision.

Second, this is a public prosecution case. According to the relevant provisions of the Criminal Procedure Law of People's Republic of China (PRC), if a judicial organ accuses your brother of being guilty, it is the judicial organ that bears the burden of proof. If you don't know anything about the place, means and weapon of murder, no matter how much the judiciary suspects that your brother "killed", he will be acquitted because there is no suspicion. Of course, if you want to help your brother, you can also investigate the evidence about his innocence and provide it to the judicial organs, so as to clear your brother's innocence as soon as possible!

Your brother has been put on file for investigation as a criminal suspect and has been taken compulsory measures. According to the relevant provisions of the Criminal Procedure Law of People's Republic of China (PRC), as a criminal suspect, your brother has the right to entrust a lawyer to seek legal help. Article 96 of the Criminal Procedure Law of People's Republic of China (PRC) stipulates that a criminal suspect may hire a lawyer to provide him with legal advice, appeal and accusation on his behalf after being interrogated for the first time by the investigation organ or from the date when compulsory measures are taken. If the suspect is arrested, the lawyer hired can apply for bail pending trial. In cases involving state secrets, the criminal suspect's employment of a lawyer shall be approved by the investigation organ. The entrusted lawyer has the right to know the charges charged by the criminal suspect from the investigation organ, to meet the criminal suspect in custody and to know the relevant information from the criminal suspect. When a lawyer meets a criminal suspect in custody, the investigation organ may send personnel to be present according to the circumstances and needs of the case. When a lawyer meets a criminal suspect in custody in a case involving state secrets, it shall be approved by the investigation organ. Article 33 stipulates that the criminal suspect has the right to entrust a defender from the date when the case is transferred for examination and prosecution.