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Unit 4 Assignment C - Expert Witness Statement
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Expert Witness StatementUnit 4
Assignment C
Statement of: (insert name)
Date of Birth: (insert date)
Occupation: Forensic Chemical Analysis Apprentice
Workplace Address: (insert address)
Professional Qualifications/Experience: LVL 3 BTEC qualification in forensic and criminal
investigation, GCSEs at grade 5 and above. A year working in forensic science analysing
chemical, biological and physical evidence in labs.
This statement (consisting of pages each signed by me) is true to the best of my
knowledge and belief and I make it knowing that, if it is tendered in evidence, I shall be liable to prosecu
Receipt of Items
From records that are available to me, I understand the the exhibits listed below were
received at: (insert address)
In relation to the case: 030323MM01
Exhibit numbers:
1 - Bullet casings
2 - hair strands on table
3 - broken glass cup on the floor
5 - handwriting note left on table
6 - lipstick tube
7 - written envelope
8 - white powdered substance on table
9 - potential blood sample on table
10 - blood on victim
11 - hair samples on clothes of victim,
12 - white powdered substance on table
13 - lipstick stain on clothing (t-shirt)
14 - Clothing on victim (consisting of t-shirt and jeans)
15 - potential blood stain on envelope
Purpose of Examination
1 - In order to determine which gun brand/type the bullet came from.
2 - In order to determine the type of hair present/colour
3 - You can see whether there is any fingerprint evidence present
5 - You can see if this handwriting is linked to the victim or offender - and work out an
offender profile based on the visual evidence, you can also test it for fingerprints.
, 6 - Tested to see whether it matches the lipstick stain on the t-shirt.
7 - You can see if this handwriting is linked to the victim or offender - and work out an
offender profile based on the visual evidence, you can also test it for fingerprints.
8 - Tested to see if this substance is in fact drugs and how it links to the scene - can help
confirm drug usage.
9 - Can be tested to confirm whether it is the victims or offenders blood - and can help to
draw conclusions about whether that biological evidence is present.
10 - Can be tested to confirm whether it is the victims or offenders blood - and can help to
draw conclusions about whether that biological evidence is present.
11 - To determine the colour of the hair and see if it’s compatible to the victim or offender.
12 - Can confirm whether the substance is in fact drugs or not, what type of drug etc.
13 - Analysed to see if lipstick links to lipstick found on table in exhibit number 6.
14 - Can be analysed to confirm what type of fibres the clothing has on it.
15 - Can confirm whether blood is present on the envelope, envelope can also be analysed
further for fingerprints.
Results of Examination
1 - The examination of the bullets concluded the bullets found on the scene did not relate to
the same gun, this is because upon examination the manufacturer number on the guns
came from two different companies.
2 - The hair strands returned that they were brown hair strands from undyed hair, after
putting them under a microscope and analysing them.
3 - The results concluded there were partial fingerprint evidence found on the pieces of
broken glass.
5 - The handwriting note was tested using offender profile analysis and the results came
back that concluded a number of things about the potential character of the author, with
things such as that he is a very closed off person, as well as having trouble connecting with
others, alongside this you can also tell that they have strong emotions.
6 - The lipstick was found to have the same pink pigments used for the lipstick on the
clothing, therefore you can link these two pieces of evidence together. Furthermore, the
chromatography revealed shades of red within the lipstick, which was then linked to the
brand ‘MAC’.
7 - The handwriting in the envelope revealed the same results as exhibit number 5, the
envelope was also tested for fingerprints using both iodine beading and ninhydrin spray, and
yielded results that fingerprints were present. The fingerprint testing then further revealed
that (by analysing the different features of the fingerprint), it was in fact the same as exhibit
number 3, concluding they are from the same person.
8 - The results revealed that the substance was baking powder, using the boiling point of
254 degrees Celsius, as tested by collecting the substance in a capillary tube and using the
melting point, and then finding the substance with the same melting point.
9 - The testing done on this revealed that there is in fact blood present and the substance is
blood.
10 - The testing done on these using presumptive testing also concluded that blood was
present.
11 - The hair was found to have also been brown undyed hair, which is straight (in no means
curly).
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