Using Fingerprints to Identify Criminals

In the early civilization, I used a brand to prove my identity to criminals. The thief was robbed of the hand used for the crime and the ancient Roman used a tattoo to mark the soldier to prevent their team being abandoned. Prior to the 19th century, law enforcement officials with visual memory discovered that criminals were arrested through sight. Photo shoot reduces the burden of memory, but it does not solve the problem of crime identification due to personal image change. French anthropologist Alphonse Bertillon designed a system to measure and record the dimensions of certain parts of the body.

One of the main uses of fingerprints is related to criminal investigation. Fingerprints formed by a combination of skin sweat and oil between the fingertip pattern and the surface are often used to identify criminals. Fingerprints are used to identify unknown victims, witnesses, or suspects to verify records and, most importantly, are used as links between suspects and crimes. Even without the suspects of crime, fingerprints can help to exploit potential customers and provide clues about criminal size, gender, and occupation. Small prints are often made by small people, and wall fingerprints show the height of the suspect. Even without printing it may be an important factor. For example, in suicide scenes, you should not see any signs of trying to erase printed matter.

Since the late nineteenth century police agencies around the world have used fingerprinting methods to identify suspects and victims of crime. The basis of traditional fingerprint recognition technology is simple. The skin on the surface of the palm of the palm forms a ridge, a so-called shaped papillary ridge whose shape is unique to each individual and does not change over time. Even the same twins (sharing their DNA) do not have the same fingerprint. The best way to make potential fingerprints visible is to be able to photograph them, which can be complicated, for example it may depend on the type of surface left . It is often desirable to use "developers", typically powders or chemicals, to create a high degree of visual contrast between the raised pattern and the surface to which the fingerprint is attached.

For centuries, forensic scientists have used fingerprints as a means of identification in criminal investigations. Fingerprint authentication is one of the most important criminal investigation tools because it has two characteristics of persistence and identity. Human fingerprints do not change with time. A scrubbing bump that produces a fingerprint is formed inside the uterus and grows proportionally as the baby grows. Permanent scratches are the only way to change fingerprints. In addition, fingerprints are unique to individuals. Even the same twin has different fingerprints