The majority of criminal suspects with a record, aside from personal information such as height, weight, and portraits, will also have their fingerprints, DNA, and other biometric data collected.
This is something that has only been perfected in recent years.
In the past, once people were caught, that was it; they would go straight to trial and be sent away.
Later, the ministry organized a large-scale biometric data collection of detainees.
It was precisely because of this data collection that many unsolved cases were matched with biometric information, and the cases were solved.
This was inevitable, as many criminal suspects do not necessarily commit only one crime in their lifetime.
But when they are caught, it is often only for one crime.
If the police do not have the relevant evidence, the suspects naturally won't reveal it themselves, as it would only increase their prison terms.
