The removal of writing by a physical or chemical means.
What is an Obliteration?
100
A method of physically separating the components of inks.
What is Chromatography?
100
An item prepared with the intent to deceive or defraud.
What is a forgery
100
What three tests can be used to identify Indentations?
UV light, Iodine test, Flashlight
100
Anything found at the crime scene that proves or disproves a fact.
What is Evidence?
200
Name two things that a forensic scientist might use to characterize paper samples?
Raw material, weight, density, thickness, color, watermarks, age, fluorescence
200
The unit used to measure distances in paper chromatography.
What is millimeters (mm)?
200
Name 2 different types of forgery?
Check Fraud, Paper Money, Identity, Credit Cards, Art, Contract
200
What element was used to detect the obliterations in our labs?
Iodine
200
Blood type is what type of evidence?
Class Evidence
300
Erasing a message written in pencil would be an example of what type of Obliteration?
Physical Obliteration
300
A number that represents how far a compound travels in a particular solvent.
What is the Retention Factor (Rf)?
300
One made by tracing a genuine signature (can use a light box, carbon paper, pressing hard and tracing indentation). Microscope can resolve the forgery because line quality may be inconsistent.
What is a Traced Forgery?
300
What color did the US and Canadian currency turn in iodine solution? Why did they turn those colors?
US: Yellow, Canadian: Dark Blue. US currency has no starch.
300
Give an example of Direct Evidence.
Testimony.
400
What type of evidence is handwriting?
Individual Evidence
400
How do you measure the Retention Factor?
Chemical Distance divided by Solvent Distance
400
Made without a model of the signature. Most common and easiest to detect. Usually the case in petition fraud and anonymous harassing subscriptions.
What is a Blind Forgery?
400
What was the name of the Solvent used in the chromatography lab?
Acetone
400
DNA evidence was first used in the court during what decade?
The 80's.
500
The crossing of t’s and the dotting of i’s, j’s, or any other letters or punctuation marks belong to which of the 12 Characteristics of Handwriting?
Diacritics Placement
500
What does TLC stand for (and I don’t want “no scrubs”)?
Thin-Layer Chromatography
500
One made by copying a genuine forgery. Often the forger practices the signature so much that he or she can avoid many of the hesitations and pen lifts usually seen in a forgery.
What is a Simulated Forgery?
500
After conducting a paper chromatography test, a student calculated his Rf value to be 0.50. The solvent traveled 50 mm. How far (in mm) did the chemical travel?