because you have suspects and they take their finger print and it is probley one of them
The length of time police keep fingerprints can vary depending on the jurisdiction and the nature of the case. In general, fingerprints may be retained indefinitely, especially for serious offenses or if the individual has a criminal record. Some jurisdictions have regulations regarding the retention and disposal of fingerprint records.
System for Tasking and Operational Resource Management
Automated Fingerprints Identification System
If a crime is committed, and fingerprints are part of the evidence gathered by the forensics team in a police department, they are first run through their database to see if they match anybody already in the system. If not, then these services take prints of suspects and attempt to match them to those from the crime scene
Fingerprints were used for the first time in 1901. Scotland Yard started using the Henry Classification System, invented by Sir Edward Richard Henry. Five years later, in 1906 the New York City Police Department became the first in The United States to use fingerprinting.
"An Englishman, Sir Edward Henry, who had been given tuition in fingerprints by Galton, devised a workable classification system independently of Vucetich and implemented it in India in 1897. Henry published his book Classification and Uses of Fingerprints in 1900. In 1901, Henry was appointed Assistant Commissioner of Police at New Scotland Yard and began to introduce his fingerprint system into that institution. By the end of that year, the Fingerprint Office at New Scotland Yard was fully functional, the first British court conviction by fingerprints being obtained in 1902. Approximately 10 years after the publication of Henry's book, his classification system was being used by police forces and prison authorities throughout the English-speaking world."
The police officers have a computer system in their car to do that. The computer allows them to access the database to see people's license plate number.
Sir Francis Galton, a British scientist, was the first person to devise a system of classifying fingerprints in the late 19th century. He created a method for categorizing fingerprints based on their patterns and characteristics, laying the foundation for modern fingerprint identification techniques.
police integrated patrol system
No. False!!
Automated Fingerprint Identification System (AFIS)
How long does a fingerprint last in a system if not used for 7 years