The major of criminal execution (investigation direction) focuses on the investigation in prison, mainly mastering the investigation, trial and arrest of criminal cases in prison, and the scope of investigation is limited to the prison.
The major of criminal investigation is mainly to study the investigation, interrogation and arrest of criminal cases, as well as social management. It needs to master the knowledge and skills in public security management, public security punishment, on-site investigation, trace inspection, document inspection, criminal laboratory inspection, criminal photography, investigation information, investigation interrogation, investigation measures, drug control and seizure.
Compared with the criminal investigation specialty, the criminal execution specialty (investigation direction) requires not only mastering the knowledge and skills of criminal investigation. However, the criminal execution major (investigation direction) requires relatively low investigation skills and knowledge of investigators, and prison investigation is only one aspect of criminal investigation.