Gunpowder residue patterns can be detected by what?
a. The Greiss test
b. Infrared photograph
c. Both a and b
d. Neither a nor b
Question 2
Which technique of detecting gunshot residues holds the most promise for the immediate future?
a. Infrared spectroscopy
b. Scanning electron microscope (SEM) testing
c. Neutron activation analysis
d. Dermal nitrate test