ipl-logo

Deposited Fingerprints Lab Report

1920 Words8 Pages

Abstract Here, the use of attenuated total reflectance infrared spectroscopy to analyze latent, lifted fingerprints is examined. Recently, there has been an upsurge in using IR spectroscopy as it can objectively define chemical properties of residues on fingerprints without damaging the sample. The use of fingerprints is heavily weighted in the field of forensics. Determining the chemical composition of the residue on a deposited set of fingerprints can give more insight to the events prior to the deposit of said prints. Here, the use of FTIR-ATR is used to determine whether aspirin can be detected in sample fingerprint. The way the aspirin had contaminated the fingerprint varied in quantity and the way it was collected on the fingerprint. …show more content…

There are two means of developing a patent print. Depositing a pigmented print on a contrasting surface is a common way. An example would be lightly coating the ridges of a fingerprint in black ink and depositing it on a white paper (Crime museum). These types of prints can not give much insight into the 3D rendition of the finger. A second type of fingerprint which can be visible is known as a plastic fingerprint which is formed by pressing a fingertip on a surface which can easily change its shape such as wax, tar or drying paint, which creates a three dimensional rendering of the fingerprint (Crime museum). Patent fingerprints and plastic fingerprints are highly visible while latent fingerprints require additional processing for visibility purposes (Crime …show more content…

Stretching (which can be coupled with other atoms in or out of sync) are the basic examples of vibrational modes. There are more interesting modes such as scissoring, rocking, and wagging. The number of ways molecules are able to vibrate are dependent on whether the molecule is generally linear or not. For the most part, linear molecules have more degrees of freedom than their non linear counterparts (Chem libretext). The Fourier transform is a mathematical function that can be used to show the different parts of a continuous signal. With respect to Infrared spectroscopy, FTIR exposes a sample to different wavelengths and measures which wavelengths are absorbed. It overall has made the structural analysis of molecules much easier by dividing bands into key components one can analyze to hypothesize functional groups present in a molecule. Attenuated total reflectance, or the ATR enables solid or liquid samples to be examined with minimal preparation by collecting a series of beams. RSC best defines FTIR-ATR

Show More
Related

Christopher Vaughn Case Summary

978 Words | 4 Pages

There are different ways that prints can be developed in crime labs; by the use of traditional powders, fluorescent powders, chemicals, and superglue. They can be viewed under laser and UV lighting. When the finger print analysis was done on the magazine, Christopher Vaughn’s fingerprints did not show

Read More

Analysis Of Brandon Mayfield In The Madrid Bomber Case

1002 Words | 5 Pages

In relation to the fingerprint analysis, examiners should analyse the fingerprint in isolation, examining in the first place the evidence from the crime scene and documenting their conclusions before making comparisons against a target, as happened in Goodwin’s case. This will erase the potential influence that the contextual information about the suspect could have on examiners (Dror, 2009). Regarding the pressure to close the case in Goodwin’s case, it’s relevant the study of Charlton performed in 2010, who performed 13 semi-structured interviews with experienced fingerprint examiners. He noticed that examiners reveal a personal interest in catching criminals and solving crimes, with could lead them not to be objective. They also express a desire to give definitive conclusions as a result of their work, a strong need for closure and the aspiration of the detection of a fingerprint match (Kassin, Dror & Kukucka,

Read More

Richard Ramirez Analysis

1776 Words | 8 Pages

The Richard Ramirez "Night Stalker" case was one of the first major cases to use automated fingerprinting technology (Frese, 2011). Today, the fingerprinting database gives various probable identifications, then a trained fingerprint expert must compare the prints to find a likely identification. Considering that Ramirez's prints were found on the mirror of a stolen vehicle we can conclude that his fingerprints were two-dimensional, therefore the prints are termed as latent or residue prints. The authorities at the crime scene power-dusted his prints considering that is the best physical method for collecting fingerprints. Once analyzed using the ACE-V (analysis, comparison, evaluation and verification) method, the fingerprint expert was able to identify them as belonging to Ramirez.

Read More

Andrea Campbell Forensic Evidence Essay

494 Words | 2 Pages

There is powerful verification that fingerprints aren’t foolproof. In “ Forensic Science: Evidence, Clues, and Investigation” by Andrea Campbell, she gives a strong explanation of how forensic science plays a vital role in solving criminal cases. Campbell has shown that forensic evidence is unquestionably the most dominant type of evidence to present at a trial. In the same way, “...unless the criminals take something away from the crime scene, hard evidence does not leave.

Read More

Mayfield Drugs Case

1238 Words | 5 Pages

Ways to collect the prints is through photographs or type. Submit the intentionally recorded prints of everyone who may have handled the evidence, including the suspects and victims to help narrow down or eliminate to find the right person (FBI Laboratory Publications, 2013). Tying in the drug processing and fingerprinting, you can search for a latent print on a drug packaging materials. The drug item should be separated from the original packaging when it is reasonable to do

Read More

The Pros And Cons Of Fingerprinting

1172 Words | 5 Pages

Fingerprinting is method based on the uniqueness of the skin pattern - that is, each person has a completely individual pattern of papillary lines. These patterns do not change throughout life and have the property of recovering from damage to the skin in its previous form. On the one hand, this method almost completely eliminates the mistake, and on the other hand it is very cheap and easy to use (in contrast the method of identification of a person by DNA). Fingerprinting allows: 1) to identify the person who left the prints, according to the general and particular features of the papillary pattern displayed on them; 2) to exclude individual from among those who have touched the object; 3) to narrow the group of individuals suspected of the particular crime (for instance, provided that the imprint shows traces of a scar, a burn, a wart or some other distinctive feature).

Read More

Dna Fingerprinting Lab Report

1726 Words | 7 Pages

Although, in our lab report, suspect ones DNA matched the crime scene when cut with enzyme one, this can be explained by how closely related the two suspects are. Therefore two enzymes were used to cut the DNA; the suspect has to match both. Moreover, the limitation to DNA fingerprinting is, if a person were to have an identical twin. This is because identical twins have the same DNA because they come from the same egg. If a suspect’s DNA matched that of the one being tested, and they had an identical twin, a farther investigation would need to be done.

Read More

Forensic Analysis: The Real CSI

819 Words | 4 Pages

This further proves how human error is very relevant in the forensic science world, and that people shouldn’t believe that everything that they see on crime shows is true. If someone’s fingerprint is slightly close enough to someone else’s they may become

Read More

Pros And Cons Of The Future Of Policing

1359 Words | 6 Pages

It allows law enforcement agencies to enhance their security protocols. Fingerprint scanners are the most recognized form

Read More

Photographic Evidence Identification Paper

952 Words | 4 Pages

Also, some chemicals used to process fingerprints deteriorate with time. The deteriorated prints would not be reliable in the event they are needed years down the line for possible retrials or appeals. At the crime scene, I would collect prints from any items that I believe the print would be damaged while being transported, fragile items, or items that cannot be taken to the laboratory. For nonporous items, I would use latent print powders or cyanoacrylate fuming. Cyanoacrylate fuming can be used on nonporous surfaces before and after packaging to develop the fingerprints contained on them.

Read More

Personal Archetypal Patterns

414 Words | 2 Pages

Your fingerprints are a guide that explains what makes you thrive and what doesn’t. Your hands reveal your personality and how you have responded to the events of your life over time. I invite you to take a minute or so to really look at your hands. (With wonder and appreciation please, no negative judgments!)

Read More

Crime Detection Techniques Used In Criminal Cases

550 Words | 3 Pages

Second, every fingerprint has a unique pattern of friction ridges that distinguishes it from other fingerprints. Third, fingerprints share general characteristics that allow a systematic classification, (Souce 1, line 2). Out of the billions people in the world no one yet has shown the same finger print has someone else. In your finger tip there can be as many 175 different types of patterns, that make your finger prints unique. The weakness

Read More

Forensic Testing Essay

1095 Words | 5 Pages

D Assessment DNA technology Forensic testing 24.11.2014 Marius Martinsen 10D Introduction: I have chosen to investigate Forensic testing, it is also known as DNA profiling or genetic fingerprinting. During this essay I will discuss what the disadvantages and what the advantages of forensic testing are. I will also talk about how forensic testing is carried out. Forensic testing is used to identify an individual by using the DNA sequences of that person.

Read More

Potential Use Of Biometrics In The Criminal Justice Field

796 Words | 4 Pages

To begin, biometrics are considered unique physical characteristics, such as DNA, palm prints, fingerprints and even facial recognition, that can be used in an automated form to recognize a person. In sum, biometrics are biological measurements (“Next Generation Identification”). In the criminal justice field, biometrics are used often to identify suspects. Examples of this type of technology include Advanced Fingerprint Identification Technology (AFIT), and the Integrated Automated Fingerprint Identification System (IAFIS). Biometrics are important in today’s world and with the rapid advancement of technology, we can expect the use of them to increase in the upcoming years.

Read More

The Importance Of Fingerprints In The Criminal Justice System

624 Words | 3 Pages

Fingerprints, every person has them. As of today, we know that no two people have the same fingerprints. What most people do not know is that the use of fingerprints as a means of identification has been around for thousands of years.¹ Fingerprints have been used for signing official documents in China during the Han Dynasty as early as 200 B.C. and in Japan as early as 702 A.D.¹⁻² Why are fingerprints so important? Fingerprints are unique to every individual person and we can use them to find criminals in the Criminal Justice System. This paper will explain about how fingerprints became a significant piece of evidence for the Criminal Justice System and how fingerprints are collected and analyzed in a criminal case.

Read More

More about Deposited Fingerprints Lab Report

Related Topics

Open Document