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
In quadrants 1 and 2 how the amount and constituents of the fingerprint residue on the substrate affects the fingerprint image, is determined. In quadrant 1, excess sebum and moisture is first removed from the finger tips with the help of a clean cloth. In quadrant 2, fingertip is first wiped around the nose or forehead to create excess sebum. Quadrant 3 and 4 were used to compare the details between untreated and dusted fingerprint residues.
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)
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
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.
That is a good question, one worth answering. Forensics is a scientific tool that has come to its own starting about the 80’s. Fingerprinting was one of the first techniques used to help in identifying the criminals that committed the heinous acts. Fingerprinting uses a brush and powder to enhance the ridge details on the fingertips adhering to the oils left behind. Another awesome way they have been able to pull prints off soft surfaces like bed sheets is by using superglue and heat. Fascinating isn’t it? Since then Forensics has become even more evolved. Fingerprints now go into a database known as AFIS or Automated Fingerprint Identification System, which has the prints of everyone
Fingerprints are one of the best forms of evidence at any scene, and burglaries may offer many opportunities for locating prints. The standard method of fingerprint a burglary scenes is with fingerprint kit. The fingerprint kit contains a soft brush, light and dark colored powders and a roll of clear tape. Once developed the fingerprints can be photographed and/or lifted with tape. The best advantages of fingerprints at crime scenes is the computerized fingerprint database. Crime scene prints can be searched in the computer, and can help locate suspects that may have been involved in 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
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.
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.
“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)