Forensic science mod 5 review

Review Questions
1. What is the NIBIN?
The National integrated ballistic identification system is a network that provides law enforcement agencies around the world with access to images and information
2. What is rifling? What two types of markings do this produce?
Rifling is spiral grooves cut into barrels of a gun in order to make a bullet spin as it’s fired. Refiling produces grooves and lands.
3. What is a distance determination? How is this done?
Distance determination is the process of estimating distancing between shots. It can be done by looking at the patterns of powder, residue, and the shot pattern.
4. What is the Geris Test?
The Greiss test has chemicals that can help develop gun powder residue, around the bullet holes.
5. When a bullet is retrieved, how is it marked for identification purposes? What should be avoided?
When a bullet is retrieved it is marked with the investigators initials. The sides should not be marked. The bullet should be taken with care to prevent temperament.
Critical Thinking Questions
1. If you found a firearm at a crime scene, what steps would you take in order to transport the weapon to the lab?
The first thing I’d do when I discover a firearm is check the safety position and hammer. Then I’d make sure the weapon was safe to be handled and transported.
2. Why do you think it might be useful to know the distance between a gun fired and its target?
I think it would be useful because, if you know the distance between the shot fired and its target, then you could find out more clues about the shooter.
3. If you were in charge of retrieving bullets at a crime scene, what steps would you take to retrieve a bullet and take it to the crime lab?
If I was in charge of retrieving bullets the first thing I would do is carefully collect the bullet, mark the bullet, and then put the bullet in a marked container for processing.
4. What are some of the challenges in analyzing tool marks?
Some challenges could be the tool mark being duplicated (the marks left by tools in a lab). Tool marks may not give individual characteristics.
5. What is the Doppler Effect? How can the Doppler Effect be useful for a forensic investigation involving a shooting?
It’s important because it could aide in distance measurement. It could be determined by the particles from the gun powder.