Finger Marks Techniques

Method used: I used my latent fingerprint dusting powder in order to bring the print to a visible state to the naked eye and then I used my tape I had to gain a copy of the print off the handle. I then took the evidence to my forensic vehicle in order to keep it secure for further examination.

Explain the principles and processes used in the analysis, comparison, evaluation, and verification of latent fingerprints. Latent prints are formed when the body’s natural oils and sweat on the skin are deposited onto another surface. Latent prints can be found on a variety of surface they are not readily visible and detection often requires the use of fingerprint powders, chemical reagents or alternate light sources. Generally speaking, the smoother and less porous a surface is, the greater the potential that any latent prints present can be found and developed. Investigators often perform cyanoacrylate processing, or fuming, of a surface before applying powders or dye stains. This process, typically performed on non-porous surfaces, involves exposing the object to cyanoacrylate vapors. The vapors will adhere to any prints present on the object allowing them to be viewed with oblique ambient light or a white light source. (Latent, n.d)

For over a century fingerprints have been one of the most used tools of forensic science. Fingerprints have been used to identify criminals of small crimes

Exercise 2 Latent Print Development Introduction The purpose of this lab was to introduce the method of latent print development using fingerprint dusting powders and practice those techniques. When latent fingerprints are found at a crime scene, they are developed and documented by a crime scene technician and analyzed by a trained latent fingerprint examiner. Fingerprints can be classified into three general patterns: loops, whorls, and arches. Fingerprints are patterns of friction skin ridges which consist of veins, capillaries, and sweat glands.

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A jammed figure is common issue among people and refers to the finger joint pain and swelling and they need immediate to aid healing as variety of treatments are available to treat the jammed finger as if jammed fingers not addressed then it leads to further damages including fractures.

In this phase a variable light source was used to excite the fingerprint residue. This was done to obtain fluorescence from the fingerprint residue. Various spectral filters and a range of camera settings accompanied with different light sources were tested to see if any fluorescence existed. The images were compared with each other to figure out if any sample shows florescence under any specific range of wavelengths. Since, we were unaware of the fact whether the fingerprints were contaminated during any experiment we used various wavelengths for the substances that might show fluorescence under different wavelengths. The level of detail in the images remained the same as the previous phase of research and

The article “Cool at 13, Adrift at 23” by Jan Hoffman is about how some middle school students perform illegal acts and are popular and how once they get older they leave a bad footprint on their lives from trying to stay popular in an unsatisfactory way. In a study made by Dr. Joseph P. Allen, a psychology professor at the University of Virginia, shows that a boy who was popular at age 14 by doing things that were “cool” has shown that by age 22 he is a high school dropout capable of minor thefts and vandalism with drugs and drinking problems. This shows that as people get older they tend to keep on thinking that if they get themselves into trouble, they will still be popular, and as they grow older they start to become socially incompetent.

used method for this is called “tape lifting” blood stains by taking fingerprints tape and

Fingerprints fall into the category of individualisation, they are unique and specific to a person and is the most common form of identification because even twins do not have same finger prints (Jones & Pritchard, 2012). This evidential material would have been formed when Mr Port dragged his victims to the church or when he had touched them during sexual contact. Fingerprints are always visualised using a range of special techniques such as using light source, various chemicals, brushing with powders and staining with dyes (White, 2010), all these techniques need to be able to react with fingerprints so that print is seen with a naked eye. This evidence can easily identify the individual that has committed the

“Fingerprint recognition is one of the divorce inference using the impressions made by the minute ridge formations or patterns found on the fingertips. No two people have exactly the same arrangement of the ridge patterns, and the remaining patterns of any one individual unchanged. Fingerprints infallible provide a means of personal identification. Other personal characteristics may change, but not fingerprints”. (1)

Fingerprints, known for each person to have unique ones, are made of a series of ridges and furrows on the

The use of fingerprinting as a means of identification was born out of the need of law enforcement officials to have permanent records that could determine if a convict had been previously arrested or imprisoned. Before the advent of fingerprinting, law enforcement used a number of different methods to try to accomplish this. Ancient civilizations would tattoo or physically maim prisoners. In more recent times, daguerreotyping (that is, photographing) was used, but proved to be less than reliable, because people had the ability to dramatically alter their appearance (Skopitz). As a result, this method too, became obsolete with the discovery of fingerprinting, an absolutely infallible

Every time somebody touches something, they leave behind a unique signature that forever links them to that object. This link is their fingerprints, which are unique to every person, for no two people have the same set, not even family members or identical twins. Palms and toes also leave prints behind, but these are far less commonly found during crime scene investigations. Therefore, fingerprints provide an identification process that is applicable to background checks, biometric security, mass disaster identification, and most importantly, crime scene investigations. Fingerprints are so differentiated because they are made up of distinct patterns of ridges and furrows on the fingers. The ridges are the “raised” portions of the prints, and the furrows are the “recessed” portions. This perceived uniqueness has led some people to falsely accept fingerprint analysis as absolute scientific fact. Although overall fingerprints are reliable, there are definitely situations where their accuracy can come into question.

There are different types of patterns for fingerprints, there are Arches, Loops, and Whorls. An Arch is found in five percent of fingerprints encountered. There are two types of Arches a Plain Arch, and a Tented Arch. Therefore they are the rarest. Loops are found in sixty to seventy percent of fingerprints encountered. Therefore they are the most common. Whorls are found in twenty five to thirty five percent of fingerprints encountered. There are four types of fingerprints, the Plain Whorl, Central Pocket Whorl, Double Loop Whorl, and the Accidental Whorl.