The public security bureau did not file a case for intentional death.

Brother, your question is a bit complicated. In my opinion, you have a little misunderstanding about the handling of cases by public security organs. You should take the initiative to ask Rudong County Public Security Bureau, and you'd better call someone who knows the law, or hire a lawyer yourself to make things clear. In addition, the legal basis for filing a case is mainly "People's Republic of China (PRC) Criminal Procedure Law" and "Procedures for Public Security Organs to Handle Criminal Cases". You can learn it yourself online first.