Physical Evidence
What are the 3 R's of physical evidence?
What is 1) Recognize, 2) Record, 3) Recover
Explain why concerns about transmittable diseases like AIDS or HepC need to be addressed by investigative agencies.
What is if investigators do not feel safe while collecting evidence (for example, they don't feel latex gloves are fully protecting them from contact) then they may cut the investigation short/hurry the process or avoid collecting crucial pieces of evidence.
True or False: Evidence is processed at local labs because of the concern for the chain of custody if evidence were to be shipped by UPS to a different location.
What is false - receipts for transportation through UPS can be included in the chain of custody without concern to the validity of the evidence.
What responsibility trumps all other responsibilities for the first responding police officer to the scene of the crime?
What is medical aid for the injured
Demonstrate the pharmacists fold with a piece of paper and a paper clip
What is folding in 1/3rd from both directions until a small package is created with no open sides.
What are the 4 ways to record the crime scene?
What is 1) notes, 2) videos, 3) photos, 4) sketches
What is the name of the currently used analysis that provides a DNA profile?
What is Short Tandem-Repeat (STR) analysis
Define whole substrate collection
What is taking the entire object back to the lab for further processing
Name 1 of the 3 ways to measure distance in a crime scene sketch.
What is Triangulation, Polar Coordinates, or Base Line
Name and explain the 3 types of fingerprints that can be left behind at the crime scene.
What is 1) Plastic, which are left in soft material and create a 3D print, 2) Patent, which are left after contact with some kind of colored material, and 3) Latent, which are left from natural sources which cannot be seen without processing.
Blood with A antigens in the red blood cells and B antigens in the plasma and no presence of the Rh factor is known as what type of blood?
What is A-
What kind of chemical evidence allows investigators to determine how far the muzzle of a weapon is to the target they have hit?
What is gunshot residue
What's the difference between a checkerboard search and a lane search?
What is a checkerboard is split into small squares by creating parallel rows and columns through the entire scene and focusing only on each small square before moving on to the next. A Lane search splits the scene into rows OR columns and focuses on finding evidence within that lane before moving on to the next (or having a difference person process each lane).
What are the 3 types of primary classifications seen in fingerprints? Which is most common? What is one secondary classification?
What is Loops, Arches, and Whorls. Loops are most common in approximately 66% of the population. Bifurcation, ridge ending, dot, island, hook, bridge, ridge crossing, etc are all examples of minutiae identified in the secondary classification process
Explain the difference between individual and class characteristics. Which one creates an identity vs. an identification?
What is class characteristics (like blood type) is group level information which allows an identity to be created, whereas individual characteristics (such as a DNA sample) allow you to classify down to a group of only 1 person thereby creating an identification