Exam June 2015, Questions PDF

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Download Exam June 2015, Questions PDF

Description

CH1030 All Candidates

Midsummer Examinations 2015 DO NOT OPEN THE QUESTION PAPER UNTIL INSTRUCTED TO DO SO BY THE CHIEF INVIGILATOR Department

Chemistry

Module Code

CH1030

Module Title

Introduction to Forensic Science

Exam Duration

One-and-a-Half Hours

(in words)

CHECK YOU HAVE THE CORRECT QUESTION PAPER Number of Pages

3

Number of Questions

3

Instructions to Candidates

Candidates should answer any TWO questions. All questions carry 25 marks. The number of marks allocated to each part of a question is shown in parenthesis [ ]

For this exam you are permitted to use the following Calculators

Casio FX83GTPLUS or Casio FX85GTPLUS

Books/Statutes

NOT PERMITTED

Additional Stationery

NONE

Page 1 of 3

CH1030 All Candidates

1. (a) Identify, sketch and briefly describe the three basic fingerprint pattern types.

[6]

(b) Explain the motivation for visualisation of latent fingerprints and state the general approaches to this problem. Give two specific examples of reagents used to visualise latent fingerprints; in each case identify the type of surface on which the reagent would be used. (c) Identify and mark eight second level features on the image provided. [NB: Use the separate answer sheet provided that carries an enlarged image

[8] [4]

of a fingerprint.] (d) Describe the process by which a fingerprint image recovered from a crime scene would be used in the identification of a suspect. State any aspects of the process that might vary between countries with different legal systems.

[7]

2. (a) Explain the distinction between qualitative analysis and quantitative analysis, and give an example of forensic relevance when each of these would be appropriate.

[6]

(b) From the perspective of establishing an analytical strategy, how do trace and bulk samples differ?

[5]

(c) Explain the concept of a spot test and the type of information it can provide. Illustrate the answer with a specific example.

[6]

(d) As a forensic scientist, you are given a sample of a street drug to analys e. Outline the general approach you would take and suggest specific techniques that might be appropriate for each stage of the process.

[8]

Page 2 of 3

CH1030 All Candidates

3. As a forensic scientist, you are called to the scene of an arrest. Upon arrival, you are shown to a car that was stopped by a police patrol vehicle after being driven through a red traffic light. The behaviour of the passenger in the car made the police officers suspicious and, when routine questioning revealed that the occupants were not the owners of the car, the police arrested both individuals. Upon opening the boot of the car, the police officers saw a number of large packages that they suspected might be illegal drugs. Describe how you would process the scene. Your answer should include aspects relating to the vehicle, the suspects, the type of evidence you would look for and the manner in which you would handle any items of interest. Identify any tests or processes you would conduct at the scene and/or recommend be carried out in a laboratory.

[25]

END OF PAPER

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