Case overview
On the evening of the 16th January 2016 an altercation broke out at The Skiving Scholar Inn on Holyhead Road, Coventry. During this disturbance Mr. Joe Kerr was allegedly pushed through a window at the premises by Mr. Carey Oki. On his arrest, a number of glass fragments were recovered from the hair and clothing of Mr. Oki and the investigative team have asked you to establish if these originated from the broken window at the premises.

You must describe and discuss in detail the persistence, recovery of glass, and the theoretical and working principles of at least two different analysis techniques used to analyse glass evidence.

Instructions
For this assessment you are required to complete the witness statement proforma provided. This proforma has been partially completed for you, meaning that you are only required to complete the personal details/ experience, discussion, interpretation, conclusion and technical details sections (in essence those highlighted in red).

As part of this statement you will have to use Bayesian statistics to determine probabilistic data for the glass evidence, and evaluate strength of this evidence – you must provide a full breakdown of the Bayes calculation. In the technical discussion section you are expected to provide a clear, concise, yet detailed technical discussion of the analysis systems used (GRIM & SEM-EDX);

An indication of the elements to be covered and a marking proforma are provided on the following page; please note that the word limit for this assessment is 1000 words, with the Technical section being limited to 800 words.
INCLUDE the Excel file with your paper submission.
Help on essay structure: –

The following elements must be included in your essay
Section Approximate word limits
Personal data/ Experience: Complete red sections As required
(10% of mark)
Discussion: Conduct a brief discussion of the results considering the significance of the averages and standard deviations you have determined Approximately
200 words

(40% of mark)

Interpretation: Using the data provided in the witness statement proforma and the accompanying Excel spreadsheet you are required to calculate the match probability for the glass recovered in this case (you will need to conduct T-tests), and establish a hypothesis. Both of these will be covered in class.
Conclusion: This should be brief; indicate how you achieved your final result and what this means with regards to this evidence i.e. is it weak, moderate, strong… Again this will be covered in class.
Technical details: You must provide detail for the techniques uses (i.e. GRIM & SEM-EDX). This needs to be technically detailed, yet accessible to an individual not familiar with these techniques. Also include advantages and disadvantages of each. Approximately
800 words

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