Question

1. crime scene investigators want to test a dry knife for prints. which two methods could they use?

a. photography
b. powder
c. super glue fuming
d. ninhydrin

1. which substrate would you use if you were looking for a print on paper?

a. ninhydrin
b. powder
label the image with the appropriate minutiae.

1. crossover
2. spur
3. dot
4. bifurcation

for numbers 16 - 18 identify the print pattern by choosing from the following:
a. loop
b. arch
c. whorl

1. the various chemicals used to make prints visible react with _.

a. amino acids
b. water
c. dermis
d. sodium

1. which of the following is a potential drawback to using ninhydrin?

a. it will react to any moisture on the object
b. it only has a 64.7 percent success rate at visualizing prints
c. it can dissolve written evidence on the object
d. it has not been approved for use in court as evidence

1. what does iafis stand for?

a. interactive amalgamation of fingerprint identification standardization
b. intelligent animated fingerprint identification solution
c. integrated automated fingerprint identification system
d. internet assisted fingerprint identity sequences

Explanation:

• Question 10: Powder is used for dry non - porous surfaces like a dry knife. Super - glue fuming is also effective for non - porous surfaces. Ninhydrin is for porous surfaces (e.g., paper) and photography is a documentation method, not a direct print - developing method for a dry knife.
• Question 11: Ninhydrin reacts with amino acids in fingerprints on porous surfaces like paper. Powder is for non - porous surfaces.
• Question 19: Chemicals like ninhydrin react with amino acids in the fingerprint residue.
• Question 20: Ninhydrin can dissolve written ink on paper (a potential drawback when there is written evidence on the object).
• Question 21: IAFIS is the Integrated Automated Fingerprint Identification System.

Answer:

• 10. B. Powder, C. Super - glue fuming
• 11. A. Ninhydrin
• 19. A. amino acids
• 20. C. It can dissolve written evidence on the object
• 21. C. Integrated Automated Fingerprint Identification System