How did the "fingerprint" become a key to solving the mysteries of crimes?
The first enemy of “fingerprints” is dirt and moisture.. and an expert explains how to remove them from water and surfaces
Man has known crime since the dawn of mankind, or in a more precise sense, since Abel and Cain, where the first murder in human history took place. The outcome of these crimes evolves with the methods of detection.
In the following report, “The Seventh Day” sheds light through crime scene sciences on the issue of detecting the crime and the identity of its perpetrators through a series of fingerprint rings, starting with fingerprints, sweat, hair, voice prints, as well as DNA fingerprints and other fingerprints. One hundred years since fingerprints are considered criminal evidence before the courts - according to the legal expert and cassation lawyer, Yasser Sayed Ahmed.
The fingerprint, according to crime scene sciences, is every edge of the fingers, whether the hands or the feet, as well as the palm of the foot, and the palm of the hand bears a natural trace. These lines and pores secrete sweat, and the sweat leaves the form of pores on other bodies, especially smooth ones, when they come into contact with them.
fingerprint print
It is what is called the “imprint impression” and fingerprints are characterized by a characteristic known as individuality or uniqueness, as every person carries his own imprint, and it has not been proven so far that it is completely similar - that is, it is completely similar - with an imprint or imprint of others.
fingerprint detection
The importance of the fingerprint from the judicial point of view is that it may be a key to solving the mystery of many cases and crimes, as fingerprints are in most cases “hidden fingerprints” or hidden, but they may be visible if they are contaminated with dust, grease or paint. The visible fingerprint is no less important than the hidden one, as both may lead to the transfer of a clear fingerprint, which helps to identify the owner of the fingerprint or his identity.
fingerprint search
The process of searching for the fingerprint must be carried out in a logical and scientific manner through the sites where the owner is expected to be present at the scene of the event, such as the exit and entry areas and the drawers that were tampered with by the suspect. The crime scene while working with the suspect''s traces so that the required fingerprint is not affected.
The fingerprint expert must do his work at the crime scene by checking, observing and watching first, and immediately after the criminal photographer finishes his work, he can then touch any trace at the crime scene, and discovering fingerprints is a matter that depends on the use of some technical techniques, such as shedding some types of rays on walls and surfaces. It shows the effects of fingerprints that must be dealt with quickly, and raised according to sound scientific methods.
In many cases, experts at the crime scene have to remove the entire body that bears the “fingerprints” and send it to the criminal laboratory, such as weapons and other tools and antiquities, for example, due to the importance of fingerprints in this case, and to provide better working conditions in laboratories than those at the crime scene, and here they must be transferred In special cardboard containers that prevent the friction of these objects with some or others, which will damage the impression of the fingerprints they bear.
In cases where the fingerprint is visible “visible”, it is preferable to photograph it accurately, before proceeding to lift it, especially in the case if it is devastated, or in the form of dust, the brush often destroys it. The magnetic brush, and as soon as the pores of the fingerprint impressions appear, the brush must be moved in the direction of the lines themselves in order to avoid destroying them.
Perhaps the fingerprints on smooth surfaces do not pose a challenge in dealing with them by experts, but the problem is in the treatment of fingerprints on non-smooth plates, rough cartons or objects immersed in water. Chemicals that help in highlighting and raising fingerprints, and this is the task of specialized researchers, and this work is often done inside laboratories.
Fingerprint life
The age of the fingerprints, which must be known, must be addressed, as the age of the fingerprints depends on where they are located, and the method of storing them, because the first enemy of fingerprints is dirt and moisture. The lines on the finger (or the foot, the auricle, the palm of the hands, the elbow, or the elbow) appear on the surface.
If the surface is exposed to air, soil, dew, or moisture, and it is wiped or a fingerprint is placed on top of a fingerprint, the basic fingerprint is changed or distorted. For two or three months, and maybe more, I even found an imprint printed on one of the contents of a pharaonic tomb and it is still in its condition.
