The world of forensic science has progressed vastly during the past decades, and it could not have thrived without the life-changing invention of fingerprinting. In fact, fingerprinting has long been considered as the most simple and unique way of recognizing an individual. The key purpose of fingerprinting in the field of forensics across the globe is to provide forensic identification and evidence. However, at the moment, the scientific reliability and validity of the method, used for identification in forensic fingerprinting, has been challenged.
Table of Contents
1. Introduction
2. Ways to retrieve fingerprint evidence
3. Chemical composition of latent fingerprints
4. Reliability and Validity of Fingerprinting
5. Conclusion
Research Objectives and Focus Areas
This paper aims to provide a comprehensive exploration of fingerprinting as a forensic tool, examining the methods for retrieving evidence and addressing contemporary challenges regarding its scientific reliability and validity.
- Categorization and identification of different fingerprint types (patent, plastic, latent).
- Methodologies for retrieving evidence from various surface types, including porous, nonporous, and human skin.
- Chemical constituents and composition of latent fingerprints.
- Critical analysis of the reliability, accuracy, and current scholarly debates surrounding forensic fingerprinting.
Excerpt from the Book
Ways to retrieve fingerprint evidence
Retrieving fingerprint evidence often requires a calculated and vigilant search. As Geddes, (2010 pg. 10) states, the sort of fingerprint left in a scene typically determines the amount of resources such as the effort and time detectives must put in retrieving fingerprint evidence. To begin with, it is important to explore and understand the types of prints relevant in fingerprinting. According to Egli and Champion (2014 pg. 88), fingerprints occur in three different types made by a friction ridge print (pattern in a medium). These types include; patent or visible, plastic and latent. Patent prints are simple to identify because they can discern through the naked eye. This type of fingerprint happens when an individual has a substance on their fingers such as ink, blood, paint, or grease that leaves a noticeable mark on a surface.
Plastic Print, on the other hand, is relatively seen through a naked eye. As Galton (2012 pg. 39) asserts, these prints are easy to trace but are less common compared to the patent prints because they come about when a negative ridge imprint is replicated as a solid object from a soft material such as candle wax, butter, clay, or soap. Last but not the least, from the research conducted by Houck (2016 pg. 57), it is hard to perceive latent fingerprints. The reason behind this fact is that latent prints comprise wetness from sweat openings and constitute almost 95 percent of fluid with the remaining from amino acids and salt. Latent prints come about when an individual have a contact with a porous or nonporous surface.
Summary of Chapters
Introduction: This chapter introduces the historical and practical significance of fingerprinting in forensic science while noting current challenges to its scientific validity.
Ways to retrieve fingerprint evidence: This section details the classification of fingerprint types and evaluates various chemical and physical techniques used to extract evidence from porous and nonporous surfaces.
Chemical composition of latent fingerprints: This chapter explores the biological makeup of latent prints, specifically focusing on the roles of sebum and eccrine sweat.
Reliability and Validity of Fingerprinting: This chapter examines the ongoing debate regarding the accuracy of fingerprinting, contrasting traditional views of uniqueness with modern critiques concerning probability and human error.
Conclusion: This final section summarizes the necessity of ongoing research into advanced fingerprinting technologies to improve efficiency and minimize errors in forensic investigations.
Keywords
Forensic Science, Fingerprinting, Latent Prints, Patent Prints, Plastic Prints, Friction Ridge, Chemical Composition, Sebum, Reliability, Validity, Crime Scene Investigation, Evidence Retrieval, Ninhydrin, Superglue Fuming, Morphological Analysis
Frequently Asked Questions
What is the core subject of this paper?
The paper focuses on the role of fingerprinting in forensic science, specifically how evidence is retrieved and the ongoing scientific debate regarding its reliability.
What are the central thematic areas covered?
The main themes include the classification of fingerprint types, techniques for physical and chemical recovery, the biological composition of latent prints, and the critical evaluation of identification accuracy.
What is the primary objective of this research?
The primary aim is to offer a comprehensive exploration of fingerprinting practices and to address the challenges posed by modern critiques of the method's scientific validity.
Which methodologies are discussed for fingerprint retrieval?
The text discusses several techniques, including iodine fuming, powder dusting, the use of a physical developer, and superglue fuming, depending on the surface type being examined.
What does the main body address regarding fingerprint types?
The main body categorizes fingerprints into patent (visible), plastic (replicated in soft material), and latent (hidden, sweat-based) prints, explaining the unique retrieval challenges for each.
Which keywords characterize this work?
Key terms include Forensic Science, Fingerprinting, Latent Prints, Evidence Retrieval, Reliability, Validity, and Morphological Analysis.
Why are latent fingerprints considered particularly difficult to retrieve?
Latent fingerprints are primarily composed of sweat and oils that are not easily visible to the naked eye, often requiring complex chemical reactions to become detectable.
What are the primary criticisms leveled against fingerprinting?
Critics argue that the process is susceptible to human error, relies too heavily on subjective opinion rather than statistics, and lacks sufficient probability-based outcomes.
How does the author propose to resolve the challenges mentioned?
The author suggests that persistent research into more advanced and modern technologies is essential to enhance efficiency and minimize the potential for identification errors.
How does surface type impact the choice of retrieval method?
The investigation method depends on whether the surface is porous (like paper) or nonporous (like a countertop), as different chemicals react differently with the fingerprint residue on these materials.
- Citar trabajo
- Joe Wessh (Autor), 2017, Forensic Fingerprinting, Múnich, GRIN Verlag, https://www.grin.com/document/494063
