Unit 23 - Forensic Evidence, Collection and Analysis
Institution
PEARSON (PEARSON)
This assignment contains all of the necessary contents such as types of evidence analysed, benefits and limitations of each evidence analysis, this assignment was written in professional witness statement, this assignment has achieved distinction grade but may not be similar standards as other scho...
Unit 23 - Forensic Evidence, Collection and Analysis
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EXPERT WITNESS STATEMENT
Name- Mohammed Salam
Age- 35
Profession- Forensic scientist
Employer- Staffordshire police
Qualifications- BSc (Hons) Forensic Science
Specialist Training – criminology for 3 years, pathology and fingerprint analysis for 2 years.
Statement of Truth: To the best of my knowledge, everything containing within this statement is
true. Each page of the statement is signed by myself and a witness.
Number of Pages: 12
Case Details: A woman named Mary Jones was found dead at 270 Leek road, Stoke on Trent,
Staffordshire, ST4 2DF. Coroner estimated the time of death to be between 8 PM and 10 PM on
19/03/2023 based on the temperature of the victim’s liver. The cause of death was determined to
be blunt force trauma to the head. The body was first discovered at 11:09 PM by the boyfriend of
Mary Jones, James Smith.
Evidence Details
1- Fingerprint
FP 1: fingerprint lifted from broken bottle.
FP 2: Fingerprint lifted from broken bottle.
FP 3: Fingerprint lifted from broken bottle.
FP 4: Fingerprints from the deceased (Mary Jones)
FP 5: Fingerprints from James Smith.
FP 6: Fingerprints from Michael wing.
FP 7: Fingerprints from Andrew McCloud.
FP 8: Fingerprints from Kevin Black.
2- Footprint
Page 1 of 13 Expert Witness Signature
Witnessed By Mohammed Salam
,EXPERT WITNESS STATEMENT
FTW 01: Footprint found in blood at crime scene.
FTW 02: Footwear impression from Kevin Black
FTW 03: Footwear impression from James smith.
FTW 04: Footwear impression from Michael Wing.
3- Pen
Ink 01: Ink from note at crime scene (black pen).
Ink 02: Pen found in home of James Smith.
Ink 03: Pen found in home of Michael Wing.
4- DNA profiles:
DNA 01: Blood situated from the base of the bottle.
DNA 02: Blood from edges of the bottle
DNA 03: blonde hairs found on the body
DNA 04: post-mortem blood sample from Mary jones
DNA 05: Cheek swab sample from James smith.
DNA 06: cheek swab sample from Andrew Mccloud
DNA 07: cheek swab sample from Ashley seller
DNA 08: cheek swab sample from Michael wing
DNA 09: cheek swab sample from Kevin Black
5- Gunshot residue
GSR 01: sample of suspected GSR found at the crime.scene.
GSR 02: Sample of suspected GSR found on Kevin Black
GSR 03: Sample of suspected GSR found on Michael Wing.
GSR 04: Sample of suspected GSR found on James Smith.
GSR 05: Sample of suspected GSR found on Ashley Seller.
Page 2 of 13 Expert Witness Signature
Witnessed By Mohammed Salam
,EXPERT WITNESS STATEMENT
6- white powders/substance.
WP 1: sample of unknown substance found on the victim
WP 2: sample of unknown substance found on James Smith.
WP 3: Sample of unknown substance found on Michael Wing.
WP 4: Sample of unknown substance found on Ashley Seller
WP 5: sample of unknown substance found on Kevin Black
Analysis including results
Ink:
The ink was tested by using TLC to determine which of the pens were used to write and who was
responsible for the crime and to make comparison of the inks from the letter that was present in the
crime scene. 3 black marker pens were used to test the similarity of the original ink from the crime
scene.
INK01: Ink from note at crime scene (black pen)
INK02: Pen found in home of James Smith
INK03: Pen found in home of Michael Wing
INK 01:
Sample Distance travelled by Distance travelled by Rf
spot (mm) solvent front (mm)
1 2.5 4.2 0.60
1.2 0.7 4.2 0.17
INK 02:
Page 3 of 13 Expert Witness Signature
Witnessed By Mohammed Salam
, EXPERT WITNESS STATEMENT
Sample Distance travelled by Distance travelled by Rf
spot (mm) solvent front (mm)
2.1 0.9 4.2 0.20
2.2 2.3 4.2 0.55
2.3 2.5 4.2 0.60
2.4 2.7 4.2 0.64
INK 03:
Sample Distance travelled by Distance travelled by Rf
spot (mm) solvent front (mm)
3 2.5 4.8 0.60
3.2 0.7 4.8 0.17
Both Ink 01 and Ink 03 has the same Rf value 0.60 and 0.17 which indicates that they match and
Michael Wing was accountable for writing notes in the crime scene.
DNA was analysed using the DNA profiling technique. All the following samples were analysed:
DNA 01- Blood from base of the bottle
DNA 02 – Blood from edge of the bottle
DNA 03 – Blonde hairs found on the body
DNA 04 – Post-mortem blood sample from Mary jones
DNA 05 – cheek swab sample from James Smith
DNA 06 – Cheek swab sample from Andrew McCloud
DNA 07- Cheek swab sample from Ashley Seller
DNA 08 – Cheek swab sample from Michael Wing
DNA 09- cheek swab sample from Kevin Black
Both DNA 01 (blood situated from the base of the bottle) and DNA 04 (Post-mortem blood sample
from Mary Jones) are identical.
Both DNA 02 (blood from the edge of the bottle) and DNA 08 (Cheek swab sample from Michael
Wing) features identical results.
Both DNA 03 (Blonde hairs found on the body) and DNA 05 (Cheek swab sample from James Smith)
are a match.
Page 4 of 13 Expert Witness Signature
Witnessed By Mohammed Salam
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