Fingerprints are something people take time to contemplate about on a daily basis. In reality, unless somebody is attempting to eliminate pesky fingerprints out of mirrors or furniture, it is unlikely an ordinary person thinks of fingerprints at all.
But for a few people, fingerprints are an essential portion of their job life. Law enforcement officers and forensic specialists spend hours thinking about fingerprints, trying to find, collect, document and compare those unique identifiers that could link a particular person to a particular offense. These individuals understand that a fundamental human characteristic that many people take for granted can be among the best tools in solving crimes.
Each person is born with unique fingerprints. No two fingerprints are alike; not on identical twins or even on a individual’s own hand. The one of a kind whorls and lines which compose a person’s fingerprints are formed at the fetal stage and stay the same during their whole lifespan. This creates a unique mark which can single out an individual linked to a particular crime, especially when a person already has their fingerprints in the records of the police or other government institutions.
Fingerprints are composed of a set of swirling lines. How these lines shape and design themselves is exactly what makes every fingerprint unique. Regardless of the unbelievable number of fingerprints, there are only seven distinct kinds of lines which make up fingerprints. These lines may start, stop or divide at any point within the print. The shapes, lengths, angles, heights, and widths create billions and billions of unique prints.
The use of these unique attributes makes it easy to see how fingerprints can help solve crimes. Leaving a fingerprint is similar to leaving a calling card at the crime scene. There are a few ways fingerprints become left behind by careless criminals. The most common way is by oil or fat that’s transferred by the finger onto an object such as a doorframe or desk. Amino acids from the finger might also leave discernable marks. Detection of fingerprints can also be detected as an impressing on a soft substance. Finally, they are sometimes drawn up by substances on the finger such as paint or blood.
Uncovering fingerprints to help resolve a crime could be carried out in a couple of ways. Adhering powders into new fingerprints will make the powder stick to the dirt and make the fingerprint visible. Another technique is using a few drops of cyanoacrylate. When these drops are heated, they vaporize, and their smoke attaches to the fingerprint leaving a white print. Specialised crime scene laboratory equipment can also find fingerprints.
Fingerprints may be stored for further investigation in several of ways, including: taking photos f the printing, saving it on a rubber lifter, keeping the original ground the print was on and copying the print using digital technology.
Hopefully, the interconnected nature of our society will eventually lead to having all of the fingerprint databases connected for easy cross-reference.