C
CRIME
S
SCENE
P
PROCESS
SING
ASSIGNME
ENT – CHEM
MICAL ANAL
LYSIS
Task nsic science is not all ab
bout dead bodies, b
DNA fingerprinting, muddy crime c
scenes and funnyy Foren
whitee coverall su
uits. It also involves wo
orking in a very v
standard chemical laboratory, ccarrying outt analyyses on insttruments that might have been used u
the previous hourr for testingg the same
e comp
ponents in co
oal or food. A
S
S
E
S
S
M
E
N
T
T
A
S
K The three t
article
es below, frrom the FBII journal Forensic Science Commun
nications, deeal with the
e appliccation of common laborratory procedures to forrensic applicaations. The links to each article are
e on th
he subject assignment weebpage. Read the articless and answer the following question
ns IN YOUR OWN WORD
DS. Simply copying c
textt will be markeed wrong! from the articles is not appropriate and w
Articlle 1 – The ba
asis for comp
positional bu
ullet lead com
mparisons 1.
2.
3.
4.
Why is the chemical co
omposition o
of a bullet reecovered from a crime sccene an important piece
e of forensic evidence? niques have been used to analyse bu
ullet composition? What techn
Why does tthe composition of lead in bullets change from batch to batch? What conclusion are drrawn from th
his article? Articlle 2 – Distrib
bution of refr
fractive indexx (RI) valuess in sheet gla
asses 5.
6.
7.
8.
9.
How is the measuremeent of the RI of a glass fraagment used
d to link it to a crime scen
ne? e the work off previous au
uthors in thiss area as desscribed in thee Introductio
on. Summarise
What was tthe purpose of the studyy documenteed in this artiicle? Describe an
nd compare the shapes o
of the three RI distributio
on graphs. What is thee most impo
ortant conclu
usion that caan be drawn from this sttudy about tthe use of RII measurements of glasss in forensic aapplications?? Articlle 3 – Metho
ods of analyssis/drug iden
ntification 10. What is thee difference between thee analytical ttechniques in
n Categories A to C? ne to prove id
dentification
n if a Categorry A techniqu
ue is used? 11. What else must be don
A technique iss not used?
12. What mustt be done if aa Category A
ou understan
nd by the terrms “false‐po
ositive” and “false‐negattive”? 13. What do yo
he process fo
or the definitte identificattion of cannaabis. 14. Describe th
ur answers b
by email as a Word docum
ment named
d as follows: yourname_ccsp_assign.
Pleasse submit you