Page 5 - The Smoking Gun Gunshot Residue

Teacher’s

Notes

hese notes are provided to assist in the
preparation and execution of the laboratory OTHER SUPPLIES AND
Texperiment. A solutions key for the preand EQUIPMENT REQUIRED
post-lab questions can be found on pages 11 and 12,
respectively.  Lab gloves for each student
 Surfaces for alcohol swab tests
(aluminum foil, weigh boats, or
petri dishes)
SUPPLIES
First, inventory the supplies included in the  Ruler
lab kit. Supplies have been provided for up to  Distilled water
six groups of students.

 3 swab sets from male victim (6 in each set)
 3 swab sets from female victim (6 in each set) RUNNING THE LAB
During the gunshot residue detection test, students
 2 sets of control: positive and negative (6 will receive one swab from each bag. Write the
in each set)
location for each swab on the board (i.e. 1-1: Male
 Sodium rhodizonate (6 bottles) victim right palm, etc.). Instruct students to keep
 Diphenylamine (6 bottles) swabs separate so that the samples do not get
mixed up and/or contaminated.
 1 set of pipettes
 All SEM data for 6 groups (images and spectra) During the evidence examination lab, each group
should receive all data for the gunshot particle images.

THE MYSTERY OF LYLE AND LOUISE 5