This statement, consisting of 6 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 prosecution if I have wilfully stated in it anything which I know to be false or do
not believe to be true.
Dated: 19/05/2023
Signature: JIW
Qualifications and experience of witness:
A PhD in forensic science from the Oxford Brookes University.
I am currently a forensic scientist working with the Hertfordshire police. I have worked in this
field for 8 years now and have been successful in helping solve and support sufficient
evidence for crimes. Spanning from small thefts to homicides and mass murders. I did a
week of work experience with my local small police station helping accompany police
officers to small crimes in my area as well as helping with documenting and paperwork. This
helped me boost my love for solving crime and made me want to go into this profession
further.
Receipt of items:
From records available to me, I understand that the exhibits listed below were received at 34
Bluebell Lane, HP3 88Y. In relation to the case M229835.
, Exhibits:
1) 2314 – fingerprints – 4 prints found on a wine glass
2) 4458 – blood – sample of blood found on the floor
3) 7753 – unknown white powder – white powder found in a wine glass
4) 3422 – gunshot residue – hands of suspect swabbed
5) 7429 – footprint – footprints found dotted around victims body
6) 3902 – documents – selection of birthday cards and a note found in living room
Art Exhibit number Examination technique Purpose of examination
1 2314 – fingerprints - Light The purpose of this
microscope examination is to work out who
- Comparison
the fingerprints belong to so
analysis
they can be matched and be
used as evidence in court to
help with the investigation.
2 4458 – blood - Kastle Meyer The purpose of this
test examination is to determine
whether the red liquid found is
blood or not. it tests for the
presence of blood. The
presence of blood and where
the blood is found and comes
form can tell investigators a lot
about what occurred during the
crime and how it happened.
3 7753 – white powder - Marquis test The purpose of this
(drugs) examination is to determine
whether the white powder
found is a drug and if so, what
drug it is. This can help
investigators figure out if drugs
were involved and if people
were intoxicated during the
crime and potentially if the
drugs had any influence on
what happened.
4 3422 – gunshot residue - Sodium The purpose of this test is to
rhodizonate determine if the suspects
hands had any gunshot residue
on them telling investigators
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