2. If you surrender, the sentence will be lighter and lighter. Those under the age of 18 shall be given a lighter or mitigated punishment according to law.
3. The specific sentencing depends on whether the other party is at fault and whether your brother has defensive circumstances. However, if three people are slightly injured and one person is seriously injured, they shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years according to the provisions of the Criminal Law.
4. Establishing an agent can minimize sentencing.
1. According to what you said, I suggest your brother turn himself in, and the court can handle it lightly in the future.
2. For the victims, as family members, appropriate compensation can be made to gain the understanding of the other party, and it can also be used as a circumstance for the court to deal with it lightly in the future.
3. If your brother is under the age of 18, it is suggested to provide him with legal help and try to give him a suspended sentence when the court decides in the future.