Answer the following questions, without specifying a specific type of evidence.
1. How far down in the trace layers does an investigator want to go?
2. What is the only way that glass can be individual evidence instead of class evidence? What
about hairs: how can you individualize them? And, last, how do you individualize fibers?
3. How often should you collect alibi samples?
1. Discuss the proper collection of evidence at the origin of a fire that is suspected of being
initiated by gasoline. Describe the proper submission of controls for laboratory examination.
2. What are the two classes of high explosives? What is the difference between the two
3. What are some common household items that can be mistaken for accelerants?
4. If you have a positive GSR, does that mean that you have recently shot a firearm?
a. Discuss the physical evidence presented in this case.
Also, please discuss the following two topics:
b. Please comment on the probability determination used in this trial. Did you think it was
too conservative, not conservative enough, or just right?
c. Do you think the fiber evidence was enough to convict Mr. Williams?