3. It mainly depends on what stage the case is in now. If it is in the investigation stage, it is recommended to go to the public security department. If it is in the public prosecution stage, it will be submitted to the procuratorate. If it is submitted to the court at the trial stage. Prepare a written application and decide the fee after accepting the application. Of course, your friends and family will pay for it.
4. No, criminal detention is time-limited.
I hope I can solve your problem.