Criminalist Frank is using digital imaging to enhance latent fingerprints. Indicate which features of digital imaging he would most likely use for each of the following tasks:
1. isolating part of a print and enlarging it for closer examination
2. increasing the contrast between a print and the background surface on which it is located
3. examining two prints that overlap each other.
Option 6: Briefly explain the chemistry of an explosion. What is the difference between a low explosive and a high explosive?
Option 7: Describe the process of collecting evidence of explosives?
Option 8: What is the difference between screening and confirmatory tests? Why are both needed? What is a taggant? Which countries are presently using them?
Option 9: List the three principles of fingerprints and briefly describe them.
Option 10: Describe the procedures to locate and develop fingerprints.
Option 12: Describe the procedures to preserve fingerprints.