What are the three types of fingerprints found at the crime scene?
Patent, latent, and plastic
100
What are the 4 different blood types?
A, B, AB, and O
100
What can bullets be used as when investigating a criminal case?
Tracing back the original owner
Who may have had the gun at the time of the crime
100
What shape is DNA?
Double Helix
100
What are the three layers of hair?
Cortex, cuticle, and medulla
200
What are the three shapes of fingerprints found?
Whorl, arch, and loop
200
What part of the blood allows us to determine blood type?
Antigens
200
List the three compositions of bullets
Full Jacketed, half jacketed, and hollow point bullet
200
What is CODIS?
A database that stores DNA samples from people, used by the FBI and other state and federal officials
200
What can you determine from a shoe impression?
Personality, body weight, cuts, holes, or debris in the shoe
300
What is at least one way to lift finger prints?
Powder and Tape, Magna Brush, Cynanocrylate Fuming Method, Iodine Fuming, Silver Nitrate, and Amido Black
300
What can you determine from a blood splatter?
Height, angle, and speed
300
Name the three shapes of bullets
Hollow point, round nose, and wad cutter
300
Where can DNA be found in the body?
Cell nucleus and mitochondria
300
What is Locard's Exchange principle?
A perpetrator cannot leave a crime scene without leaving evidence and leaving with pieces from the scene
400
What method do suspects possibly go through when trying to leave no possible evidence?
Mutilate their fingerprints, such as burning, cutting, or other extreme course of action
400
If a person had type A+ blood, what other types of blood could it not receive?
O- and +, A-, B- and +, and AB-
400
Describe the actions that occur when someone pulls the trigger to the gun
1. Pull the trigger
2. Releases the firing pin
3. The firing pin strikes the primer
4. Primer ignites the gunpowder
5. Powder penetrates gas, pushing the bullet forward, and ejects the spent cartridge
400
What is mainly missed when proving a suspect guilty or innocent?
Bodily fluids
400
What is important when collecting evidence?
Try to preserve it as much as possible without disruption, store it safely in a paper bag (if necessary), and label
500
What are the 8 types of ridge patterns?
Fork, ridge ends, dot/eye, bifurcation, short ridge, island, crossover, and double bifurcation
500
What can possible blood stains reveal?
Can show evidence that is not visible to the naked eye, prove factual evidence, determine cause of death
500
What are the differences between a half jacketed and a full jacketed bullet? (Including impact)
Full jacketed has a complete face of copper and on impact, the copper smashes and pushes the lead threw.
Half jacketed is only half coated in copper. On impact sprays the lead in the bullet and causes more damage on the target.
500
How can DNA be used in forensics?
Narrow down class evidence to individual evidence
500
What are the 7 S's?
Securing the scene, separating witnesses, scanning the scene, seeing the scene, sketching the scene, searching for evidence, and securing and collecting evidence