Impression Evidence Analysis
Impression Evidence Analysis Quiz Crafted By-
Aastha Mahna
Team Member
Sherlock Institute of Forensic Science India Pvt. Ltd, New Delhi
Introduction to Impression Evidence Analysis
Impression evidence is simply where several objects are pressed or stamped against one another allowing the objects to transfer and retain characteristics from one another. Footwear, tire tracks, and tool marks may be some of the most overlooked types of physical evidence left at a crime scene. Extreme patience and common sense are needed to find and recover these impressions.
In other impressions there are two categories or types of impressions likely to be deposited at a crime scene. This impression evidence would be deposited either on top of a hard surface or into a softer surface. Two (2D) dimensional impressions illustrating length and width, are usually found indoors on surfaces like counter tops, glass, paper, cardboard, or ceramic and waxed floors. Three (3D) dimensional impressions that have 3 measurements, length, width and depth, are usually discovered outdoors in surfaces like dirt, sand, clay, mud, tar, or snow. I can not explain to you how to recover 3D impressions in snow.
Let's look at the questions and their answer.
Ques 1. What are the major types of impression evidence?
a) Shoe-prints
b) Tire tracks
c) Tool marks
d) All of these
Answer - d) All of these
Ques 2. Which of the following impression evidence may get destroyed easily by rainfall?
a) Tire tracks
b) Blood
c) Tool marks
d) Fingerprints
Answer-a) Tire tracks
Ques 3. Impressions may be found in which type of dimensions?
a) Two-Dimensional
b) Three-Dimensional
c) Both a & b
d) None of these
Answer- c) Both a & b
Ques 4. Which of the following is not suitable for casting impressions in snow?
a) Plaster of Paris
b) Dental stone
c) Electrostatic charge
d) Gypsum
Answer- b) Dental stone
Ques 5. What are Plastic Impressions?
a) 2D impression
b) 3D impression
c) 3D impression made into a soft rubbery surface
d) 2D impression made into a soft surface
Answer- c) 3D impression made into a soft rubbery surface
Ques 6. An instrument mark casting can be done with the help of -----?
a) Plaster of Paris
b) Silicon rubber
c) Snow Wax
d) Dental stone
Answer- b) Silicon rubber
Ques 7. Which law is associated with Impression Marks?
a) Locard’s Principle
b) Beer-Lambert’s Law
c) Gay-Lussac’s Law
d) None of these
Answer- a) Locard’s Principle
Ques 8. Pattern evidence can be defined as -
a) Additional identifiable information
b) Similar figures observed in a photograph
c) An impression created when two objects come in contact
d) A typical impression evidence
Answer-a) Additional identifiable information
Ques 9. What type of tire marks are left when someone slams on the break?
a) Yaw marks
b) Scrub marks
c) Tire Scrub
d) Skid marks
Answer- d) Skid marks
Ques 10. The first criminal case that shone light upon the relevance of footwear impression evidence came about through the -
a) Ted Bunty case in 1789
b) Richardson case in 1786
c) Matthew Samson case in 1785
d) George Philips case in 1787
Answer- b) Richardson case in 1786