I'm sorry if you want to help him, but this is a society ruled by law. Unless your relatives have not violated the criminal law, they will be investigated for criminal responsibility according to law. If your relatives only punish the provisions of the Law on Public Security Administration Punishment, they will only be fined and detained in public security.
The specific situation depends on your relatives' violations or crimes, such as the number of thefts, the amount of theft, the means of theft and so on.