Research on personal information protection in criminal investigation 并列题名：Research on personal information protection in criminal investigation Jurisprudence on personal information protection in technical investigation 并列题名：Jurisprudence on personal information protection in technical investigation Research on personal information protection practice of insurance companies 并列题名：Research on personal information protection practice of insurance companies Research on regulation of big-data criminal investigation Research on legality of the private criminal investigation Interrogation process in criminal investigation Research on personal information of privacy nature