FSP 26 Crime Dossier [PDF File, 3.2 MB]

FSP26
Crime Dossier of:
containing notes, information and details
regarding the break-in to
school
on
TOP SECRET
TOP SECRET
FORENSIC INVESTIGATIONS

FSP26
Fing e rprints
Compare the prints of the suspects to the
fingerprints found at the scene of the crime.
Complete the questions below.
Equipment
• Magnifying glass or hand lens
Table 13: Suspects’ Fingerprints
Suspect
Ms Thomas
Teacher
Mr Hill
Cleaner
Ciara
Student
Tim
Student
Rupert
Student
Portrait
Print
index finger
Evidence
Location On the door On the paper punch On the chair
Print
Questions
Do you have a match
Why / Why not
What is the distinguishing feature
Is there a reason why a print from that person would
be found in the classroom

FSP26
i mpr e ssi o n s
Compare the shoe prints of the suspects to the
shoeprint found at the scene of the crime. Complete
the questions on the next page.
Equipment
• Magnifying glass or hand lens
Table 14: Suspects’ Shoeprints
Suspect
Ms Thomas
Teacher
Mr Hill
Cleaner
Ciara
Student
Tim
Student
Rupert
Student
Shoes
Print
Evidence

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i mpr e ssi o n s
Questions
Does a shoeprint match
What is the distinguishing features(s)
Is there a reason why a shoeprint from that person would be found outside the classroom

FSP26
ANTHROPOMETRY
Try and compare the size of the shoe prints and the height of the
suspects to the shoeprint found at the scene of the crime. The
shoe print discovered in the garden outside the window was
29.2cm in length.
Table 15: Suspect height and shoeprint size
Suspect
Ms Thomas
Teacher
Mr Hill
Cleaner
Ciara
Student
Tim
Student
Foot Length (cm) 24.6 27.5 21.8 21.9 24.8
Rupert
Student
Height (cm) 163.4 179 143.5 145 162.5
Questions
Is the a relationship between foot length and height Explain your answer.
Is height relevant in this crime Explain your answer.

FSP26
H A N D W R I TIN G
analysis
Analyse the handwriting from the note and the
message written on the board with the handwriting
from the suspects. Complete Table 16: Suspects
Handwriting.
Equipment
• Magnifying glass or hand lens
Table 16: Suspects Handwriting
Suspect Usual pen used Handwriting
Ms Thomas
Black texta
– not water soluble
Mr Hill
Black texta
Ciara
Pencil
Tim
Blue pen
Rupert
Blue pen
Evidence
Location
On an envelope
Handwriting
On the blackboard

FSP26
H A N D W R I TIN G
analysis
Questions
What was the main writing characteristic that you have considered during your analysis
Do you have a match
Explain your reasoning.

Complete a chromatograph of the ink from the sample of the note found in the desk
drawer. Compare the result with your library of chromatograms and the Rf values.
(Table 10 – Personal Dossier - FSP25). Complete Table 17: Suspects Pen.
Your teacher will give you a filter paper already spotted with the ink from the note.
FSP26
table 1 7 In k ch ro mato g raphy
Table 17 Suspects’ Pen
Rf calculations
Distance form origin to spot
Distance from origin to solvent
front
Standard 1 Standard 2 PStandard 3 Crime Scene Pen
A
B
C
D
Questions
Is there a match
Why Explain your reasoning.

FSP26
P owd e r
analysis
Complete a series of chemical tests on the unknown sample collected from the crime
scene. Your teacher will give you a sample from the crime scene.
Follow the instructions from your Personal Dossier about conducting the analysis tests.
Complete Table 18: Observation of Unknown Substance.
Table 18: Observation of Unknown Substance
Observation
Unknown powder
Acetic Acid
Water
Iodine
pH indicator
Based on your results of the tests from the known substances (Table 11- Personal
Dossier - FSP 25) what do you think the substance on the desk is

FSP26
S o i l
analysis
Conduct a soil analysis on the five samples that you will be given.
Three of the samples have been collected from the crime scene: from the desk,
from the floor and from the window ledge.
Another two samples are from the pot plant on Ms Thomas’s desk and the soil
from outside the window. Complete Table 19: Soil from the Crime Scene.
Follow instructions about how to conduct the tests from your Personal Dossier.
Table 19: Soil from the Crime Scene
Desk
Description
Magnetic
particles
Colour Particle size Time to settle pH
Floor
Ledge
Pot plant
Outside

FSP26
Inv e stig ati o n
matrix
Use a matrix table for each suspect to collate all of the information
that you have gathered about the suspects and the crime scene.
This is an example for Mrs X.
Mrs X
Fingerprint
Shoe size
Shoeprint
Height: shoeprint
relationship
Handwriting analysis
Chromatography
– brand of texta
Connection to
powder
Access to classroom
Verdict
Evidence found at crime scene
Indistinct – difficult to tell
Similar
Different – had on high heels
Mrs X is quite tall – good r’ship. She could have easily written on the blackboard.
She uses running writing – the note is printed using capitals.
The ink used for the note is different to the ink in the texta that she usually uses.
She does use the black board.
She does have a key.
Could have done it but there are others who fit the profile better.
Complete the information matrix for all of the suspects in the classroom break-in.

FSP26
Inv e stig ati o n
matrix
Table 20: Ms Thomas Matrix Table
Ms Thomas
Evidence found at crime scene
Fingerprint
Shoe size
Shoeprint
Height: shoeprint
relationship
Handwriting analysis
Chromatography
– brand of texta
Connection to
powder
Access to classroom
Verdict
Table 21: Mr Hill Matrix Table
Mr Hill
Evidence found at crime scene
Fingerprint
Shoe size
Shoeprint
Height: shoeprint
relationship
Handwriting analysis
Chromatography
– brand of texta
Connection to
powder
Access to classroom
Verdict

FSP26
Inv e stig ati o n
matrix
Table 22: Ciara Matrix Table
Ciara
Evidence found at crime scene
Fingerprint
Shoe size
Shoeprint
Height: shoeprint
relationship
Handwriting analysis
Chromatography
– brand of texta
Connection to
powder
Access to classroom
Verdict
Table 23: Tim Matrix Table
Tim
Evidence found at crime scene
Fingerprint
Shoe size
Shoeprint
Height: shoeprint
relationship
Handwriting analysis
Chromatography
– brand of texta
Connection to
powder
Access to classroom
Verdict

FSP26
Inv e stig ati o n
matrix
Table 24: Rupert Matrix Table
Rupert
Evidence found at crime scene
Fingerprint
Shoe size
Shoeprint
Height: shoeprint
relationship
Handwriting analysis
Chromatography
– brand of texta
Connection to
powder
Access to classroom
Verdict
Now combine all the evidence in Table 25: Joint Matrix Table. If the evidence matches a person tick the box in
the grid, if it doesn’t cross the box in the grid.

Table 25: Joint Matrix Table
Ms Thomas Mr Hill Ciara Tim Rupert Notes
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table 2 5 Inv e stig ati o n matrix
Fingerprint
Shoe size
Shoeprint
Height: shoeprint relationship
Handwriting analysis
Chromatography – brand of texta
Connection to powder
Access to classroom
Verdict
(how many ticks have they got)
Prepare to present your results with your supporting evidence to the rest of the class.
What about the soil samples and the white powder Do they have any impact on the case