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Forensic Chemistry and Trace Analysis

  • Module code: CH7110
  • Year: 2019/0
  • Level: 7
  • Credits: 30
  • Pre-requisites: None
  • Co-requisites: None

Summary

This module introduces students to the analytical and forensic techniques encountered in trace and contact evidence analysis. The module focuses on four areas of forensic casework; drugs of abuse, fibre analysis, fire investigation and ballistics.

Aims

  • To provide an in-depth knowledge of the techniques encountered in trace and contact evidence analysis, drugs of abuse and toxicology;
  • To demonstrate the advantages and limitations of forensic instrumentation in this field and to enable students to gain practical skills associated with forensic science through the use of relevant analytical techniques;
  • To emphasise legislation relevant to the practise of forensic science;
  • To provide knowledge of sampling and storage protocols in evidence analysis.

Learning outcomes

On successful completion of the module, students will be able to:

  • Fully understand the role of the Forensic Scientist as relates to drugs, fibres, firearms and fire, and illustrate the importance of prevention of evidence contamination;
  • Discuss the techniques and methodologies used for the analysis of trace and contact evidence samples, particularly in relation to fibres and firearms.
  • Critically assess the best methodology and technique appropriate for a sample;
  • Critically interpret current legislation as applied to trace and contact evidence, drugs of abuse and alcohol analysis;
  • Devise appropriate sampling and storage protocols for a range of analytes and matrices;
  • Demonstrate communication and observation skills and have developed independent learning skills.

Curriculum content

  • Trace and contaCt evidence- recovery of trace materials, including fibres, their characterisation and comparison, contamination, use of techniques such as Optical and Electron Microscopy, (TEM, SEM, XDF). Refractive Index and birefringence measurements.
  • Firearms (ballistics), forensic examination, firearms discharge residues (FDR).
  • Fire investigation - nature of fire, location of seat of fire, laboratory examination.
  • Explosions- chemistry of explosives, forensic examination of scene.
  • Forensic toxicology.
  • Drugs of abuse and their legislation.
  • Alcohol analysis.

Teaching and learning strategy

Lectures will be given to introduce topics and guide students in directed reading in preparation for tutorial sessions where a selection of forensic analytical techniques will be discussed. Students will undertake set practical experiments in the laboratory related to the theory programme. Practical report writing will test written communication and observation skills. Workshops and fieldwork visits will comprise of a series of demonstrations and exercises (individually, and in groups, both indoors and outdoors) where forensic evidence is collected and stored for laboratory analysis. Field visits and expert guest lecturers are intended to foster student awareness of careers in Forensic Science. The module emphasizes laboratory practice, clear communication and independent working which are important employability skills.

Breakdown of Teaching and Learning Hours

Definitive UNISTATS Category Indicative Description Hours
Scheduled learning and teaching Two hour Lectures One hour workshops Three hour practical sessions (6 in total) 40 20 18
Guided independent study 222
Total (number of credits x 10) 300

Assessment strategy

Formative and summative assessment is through a mixture of practical work and case studies (500 words each, 30%) and an assignment (1,500 words, 20%).

A range of formative assessments will also be undertaken during class and independent study through the form of problem based case studies. These will provide regular feedback to students so that they can develop an awareness of their rate and level of progress, also become aware of their strengths and weaknesses.

A three hour summative exam in four sections, worth 50%, will test the students engagement with the underpinning knowledge associated with the module.

Mapping of Learning Outcomes to Assessment Strategy (Indicative)

Learning Outcome Assessment Strategy
Fully understand the role of the Forensic Scientist and illustrate the importance of prevention of evidence contamination. Assignment, practical portfolio and practical case study (F/S)
Describe and explain the techniques and methodologies used for the analysis of trace and contact evidence samples; Examination (S)
Critically assess the best methodology and technique appropriate for a sample; Examination and practical case study (S)
Critically interpret current legislation as applied to trace and contact evidence, drugs of abuse and alcohol analysis; Examination (S)
Devise appropriate sampling and storage protocols for a range of analytes and matrices; Practical case study (F/S)
Demonstrate communication and observation skills and have developed independent learning skills. Practical portfolio and practical case study (F/S)

Elements of Assessment

Description of Assessment Definitive UNISTATS Categories Percentage
Written exam 50
Coursework 50
Total (to equal 100%) 100%

Achieving a pass

It IS NOT a requirement that any major assessment category is passed separately in order to achieve an overall pass for the module

Bibliography core texts

DeHaan, J. D. Kirk's Fire Investigation, (5th Edition) Prentice Hall ISBN: 0-13-060458-5

Gardiner, M. Pocket Guide to Fire and Arson Investigation, Gardiner Associates, Middlesex, UK.

King L A, (2009) Forensic Chemistry of Substance Misuse, A guide to drug control, RSC, ISBN 978-0-85404-178-7

King L A, (2003) The Misuse of Drugs Act: A guide for forensic scientists, RSC ISBN 0 85404 625 9

NicDaeid, N. (2004) Fire Investigation, Taylor & Francis. ISBN: 0415248914

Robertson J & Grieve M, (1999) Forensic Examination of Fibres (2nd Edition), Taylor & Francis.

Bibliography recommended reading

White P C , (2nd Edition 2008) Crime Scene to Court, RSC, ISBN 085404 625 9

Misuse of Drugs act 1971 and key amendments

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