There are two possibilities when fingerprint identification analysis is unsuccessful.
The first possibility is that after fingerprint identification analysis, the owner of the target fingerprint does not have a sample in the fingerprint database.
This situation is very common.
In relation to the massive population base, the police's fingerprint database is inevitably limited.
Of course, in recent years, the police's fingerprint database has become increasingly complete.
Especially through ID card processing, the proportion of fingerprint enrollment is increasing.
Compared to the past, now every teenager applying for an ID card needs to provide fingerprints.
At this rate of development, in another 30 to 50 years, the fingerprint database should be close to complete coverage.
Of course, this is just a prospective trend for the future.
In fact, the data in the current fingerprint database only covers a small portion of the existing population.
