Is the criminal police or the criminal investigation coming first?

Murder cases are generally solved by public security organs, and criminal investigation departments of public security organs are responsible for solving cases. Homicide is a criminal case that causes death, including intentional homicide, intentional injury causing death, robbery and homicide. According to the division of criminal cases within the public security organs, the criminal investigation departments of the public security organs organize specific investigations to solve cases and identify criminal suspects. Investigators who report, accuse, report, surrender or surrender shall immediately accept the case, ask about the situation and make a record of the inquiry. After the written record is checked (read out), it shall be signed or sealed by the informant, accuser, informant, transferred person or surrendered person (informant), and may be recorded or videotaped if necessary.