CHAPTER D Flashcards
0
Q
- What does the general chemistry subunit do
2
A
- Identifies dyed and chemicals used in bank security.
- Analyses controlled substances.
- Compares stains or markings with suspected sources.
- Conducts analyzes on questioned ink.
- Analyzes chemical analysis on unknown solids and liquids.
- Performs pharmaceutical identification
1
Q
- A crime laboratorys chemistry section is divided into subunits. What are those 3 subunits.
1
A
- General chemistry subunit.
- Toxicology subunit.
- Parts and polymers subunit.
2
Q
- What does the toxicology subunit do
3
A
- Conducts analysis of drugs or poisons in food and biological specimens.
- Investigates claims of product tampering.
3
Q
- What does the paints and polymers subunit do 5
4
A
- Analyze paint chips
- Analyzes paint on cars to determine make model and year
- Compared plastics.
- Analyzes tape
- Analyzes caulks , seekers , and adhesives
4
Q
- What is the POLYMERASE CHAIN REACTION TECHNIQUE
5
A
- Process in which DNA strips can be rapidly reproduced fit scientific analysis
5
Q
- What sections are usually included in a crime laboratory. 7
6
A
- Trace evidence.
- Questioned documents.
- Forensic chemistry unit.
- DNA analysis.
- Ballistics.
- Latent prints.
- Forensic photography.
6
Q
- What are the 3 main types of fingerprints.
A
- Latent fingerprints.
- Plastic fingerprints.
- Visible fingerprints.
7
Q
- What are latent fingerprints. When do they occur
A
- They occur when an entire pattern of whorls on the finger , which contain small amount of grease, oil, perspiration, or dirt, is transferred to an object when it is touched.
8
Q
- What is a plastic fingerprint
A
- It results when a finger pressed against plastic material and leaves a negative impression of friction ridges.
9
Q
- What is a visible fingerprint.
- What is it also called
10
A
- A print that has been adulterated with foreign matter.
2. Also called s dust print
10
Q
- What are the 3 general groups of fingerprint patterns.
2. Those three patterns can be divided into smaller patterns what are the 7 smaller patterns between the same groups.
A
- A. Arches.
B. Loops.
C. Whorls.
2. A. Arch loop. B. Whorl. C. Plain radial. D. Plain tented. E. Ulnar. F. Accidental double. G. Central pocket.
11
Q
- What are the 6 ways a fingerprint can be developed.
A
1. A. Powders. B. Iodine. C. Ninhydrin. D. Silver nitrate. E. Superglue fuming F. Lasers.
12
Q
- What does amino black protein do.
- What is amino black protein
- How is it used for fingerprinting
A
- It’s used in biochemical research to stain for total protein on transferred membrane blots.
- An amino acid staining diazo dye.
- It detects blood present with fingerprints by staining the proteins in blood a blue black color.
13
Q
- What is AFIS. - automated fingerprint identification system.
- Who was it developed and maintained by.
- What type of fingerprint system is AFIS
- What can AFIS determine.
A
- A fingerprint system.
- The FBI.
- It’s s 10 print system for searching fingerprints.
- It can determine is a person has a prior arrest record. And then maintains a criminal arrest record history
14
Q
- What 5 functions can AFIS do.
A
- Enhance image quality of a print.
- Compare a 10 print resort to the criminal fingerprint repository.
- Search for prints when no suspect exists.
- Automatic searches of new arrest prints against unsolved prints
- Create files of print records to support major cases
15
Q
- Who first discovered using fingerprints.
A
- William Herschel
16
Q
- What should be done with clearly visible fingerprints. Before they are attempted to be developed.
- What should be done with wet fingerprints. Prior to attempting to be developed.
A
- They should be photographed.
2. They should be allowed to dry first.
17
Q
- What should u use to develop a fingerprint which is unseen
- How.
- What kind of powder should be used
- What two powder colors are usually the best for developing a print
- What surface should Gray powder be used for.
- What surface should black powder he used for
A
- Use powder.
- The powder is lightly brushed over the print area so it will adhere to the oils of on the surface and develop a print pattern.
- The powder should contrast with the color of the surface of the print.
- A. Black
B. Gray. - Gray for dark Backgrounds.
- Black for light backgrounds.
18
Q
- What 4 types of brush should be used for developing prints.
- What is a manga brush
- How do beginners usually mess up fingerprinting.
A
- A small camel hair brush.
- A Nylon brush.
- A fiberglass brush.
- A manga brush.
- A magnetic brush that uses magnetic powder.
- By using too much powder. And too little brushing.
19
Q
- What 2 surfaces do investigators use fluorescent powders on
- What are the 2 forms of fluorescent powders
- What is done before the powders are used
20
A
- A. Currency.
B. Documents. - A. Powder.
B. Aerosol - An ultraviolet examines the first to display any prints.