I'm sorry to hear about your situation and I understand that this must be frustrating for you. Here are some relevant laws that may assist you in understanding the case:
1. Article 35 of the Saudi Basic Law of Governance states that “no person shall be arrested, imprisoned, or have their actions restricted except in cases provided by the law”.
2. Also refer to the Law of Criminal Procedure (Royal Decree No. M/39), particularly:
- Article 2: "Detention and imprisonment, as well as the imposition of penalties, shall be in accordance with the provisions of the law."
- Article 4: "Any accused person shall have the right to seek the assistance of a lawyer or a representative to defend him during the investigation and trial stages."
- Article 36: "No person shall be arrested or detained except on the basis of order from the competent authority. This order shall be referred to the Bureau of Investigation and Prosecution within forty-eight hours. The Bureau, within twenty-four hours from the time of the accused being received, shall proceed to investigate him."
As per the laws, I would strongly suggest getting a lawyer or a legal representative to help your brother. The lawyer will be able to assist in making sure that your brother's rights are being protected during the investigation and trial stages. Stay persistent in requesting his release if he is indeed innocent. If your brother has been implicated solely based on association, the lawyer should be able to uncover and highlight this fact.
Please refrain from giving or acknowledging any false confessions during this process. It's crucial to share all the available facts and evidence to your lawyer in order to pave the way for a strong defence.