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Crime Scene Basics
Fingerprints
Impression Evidence
Physical Evidence
Hair and Fibers
100
A crime scene is any physical location in which a crime has occurred or is suspected of having occurred. There are 2 types of crime scenes, primary and secondary. What is the difference between these 2?
A primary crime scene is the original location of a crime scene or accident. A secondary crime scene is an alternate locations where additional evidence has been found.
100
You have the same fingerprints as your twin sister. True or false?
False! No 2 people have the same fingerprint!
100
True or false. Impressions are created when one object is pressed against another material with enough force to leave an impression of the object.
True!!
100
True or False? Paint can help forensic investigators identify a specific make and model of a car.
True! By using databases, paint evidence can be compared to 40,000 types of paint!
100
True or false. Hair is made of the same protein, keratin, as nails.
True!
200
What is an alibi? A. Person thought to be capable of committing a crime. B. Person associated with someone suspected of committing a crime. C. Statement of where a suspect was at the time of a crime.
The answer is...C! The statement of where a suspect was at the time of a crime.
200
What are the 3 classes of fingerprints? A. arch, loop, whorl B. ridge, cracks, arch C. loops, swoops, and lines
The correct answer is...A!
200
List 2 types of examples of impression evidence.
Possible answers... Shoeprints Tool marks Tire tracks Bite marks Marks on a bullet
200
What is ballistics and how can this help solve a case?
Ballistics includes the ammunition, firearms and residue found at the crime scene to help match suspects to a crime.
200
Genetics plays a large role in the shape and texture of your hair. What else plays an important role in the health of your hair?
Possible answers: Nutrition Intentional alterations (perms, straightening, coloring)
300
What are the 3 types of evidence? A. Guilty, innocent, and witness evidence B. Testimonial, physical and trace evidence C. Physical, mental and emotional evidence
The answer is...B! Testimonial includes oral and written statements. Physical includes and material items found at the scene. Trace refers to physical evidence found in very small amounts.
300
Fingerprints have general characteristics called ________ patterns that allow them to be identified in a database. A. circular B. ridge C. tented
The correct answer is...B!
300
What can making a cast of a tire track help the forensic investigator with in solving the case?
Possible answers... Tread patterns (which could narrow down the type of car) Wear pattern Unique characteristics (imperfections or defects)
300
What kind of evidence can reveal where a person has traveled or possibly visited? A. Dust B. Dirt C. Sand D. All of the above
The answer is... D!! All of these pieces of evidence can give investigators clues to locations and places.
300
Hair is composed of 3 principal parts. What are they? A. cuticle, cortex, medulla B. cortex, pigment, scales C. follicle, cuticle, medulla
The correct answer is...A!
400
Who is typically the FIRST to arrive at the scene of a crime? Also, what is their main job?
Police officers. They are responsible for securing the scene so no evidence is destroyed and detaining persons of interest in the crime.
400
Another term for fingerprints is A. terodactyls B. dactylograms C. dactylprints
The correct answer is...B!
400
Tool marks can be classified in 2 ways. What are they and what do they mean? A. impressions and scratches B. nicks and chips C. ridges and striations
Impressions and scratches. Impressions are when a tool hits a softer surface, the shape of the tool and imperfections in its surface may leave behind an impressions. Scratches are the ridges or striations left on the surface as a tool moves across the surface.
400
Shoeprints, bite marks and tool marks are all examples of what kind of evidence? A. fingerprints B. Witness statements C. Impression evidence
The correct answer is...C!!
400
A _______ is the smallest unit of a textile material that has a length many times greater than the diameter. A. piece of wool B. carpet C. fiber
The correct answer is fiber!
500
What are the 4 steps to crime scene protocol in order? A. process, examine, document, interview B. interview, examine, document, process C. examine, interview, process, document
The answer is...B! Step 1: Interview Step 2: Examine Step 3: Document Step 4: Process
500
What are the 2 types of arches? A. plain and central B. ulnar and radial C. plain and tented
The correct answer is...C!!
500
Bite marks are very useful pieces of impression evidence because you can tell a lot from a persons teeth. What are some of the things you can analyze about teeth?
Possible answers... Type of bite (animal or human) Characteristics such as position, overbites, dental work, wear patterns) Color of bitten area (this tells you approximate time frame) Swab for body fluids for DNA
500
Investigators can compare the edges of tape, glass fragments, paint chips, etc. to find possible matches. How can they do this?
They are looking for FRACTURE LINES to match up. (Remember the match from the CSI episode??)
500
How can a fiber help to solve a case?
Matching unique fibers on the clothing of a victim to fibers on a suspects clothing can be very helpful to an investigation.