Search Methods
Polygraph
Crime Scene
Evidence
DNA
Blood
Random Pt1
Random Pt2
100
The search method that doesn't have a formal geometric pattern or is easily definable
Link Method
100
Sometimes used in forensic cases to help determine the truthfulness of someone who may be connected to a possible crime.
Polygraph
100
The term for someone that has just died
Decedent
100
Tiny fragments of physical evidence, such as hairs, fibers from clothing or carpeting, and pieces of glass.
Trace Evidence
100
What is the electrical charge of DNA?
Negative
100
What are the four main blood types
A, B, AB, O
100
The point in time when a person ceases to exist
Time of Death
100
How many minutiae points do you need for a positive match?
12 (12-15)
200
Used on large, outdoor crime scenes. Searchers follow the first line pattern and search in the same manner as the line method. Once the first line pattern is complete, searchers realign on the other line pattern.
Grid Method
200
What is another name for a Polygraph?
Lie Detector Test
200
The name of the decedent in PLTW who has just died
Anna Garcia
200
The information about a particular person that exists on the internet as a result of their online activity
Digital Evidence or Digital footprint
200
Guanine's base pair match
Cytosine
200
The blood type associated with agglutination in both the Anti-A antibody and the Anti-B antibody wells
AB
200
The place where an offense has been committed
Crime Scene
200
The part of the hair that is responsible for its color
Cortex
300
Used on large, outdoor crime scenes. Members of the search team are arranged at regular intervals, usually arm’s length, and then proceed to search along straight lines.
Line (or strip) Method
300
The physiological data (vital signs) that is measured while conducting a polygraph...
Blood pressure, heart rate, respiratory rate, and skin conductivity
300
Signs, items, or material that supports, or corroborates a crime
Evidence
300
The outer most part of a hair
Cuticle
300
Which direction does the DNA travel to (Charge).
Positive
300
The blood type associated with agglutination in neither the Anti-A serum or Anti-B serum
O
300
The reason why investigators draw a sketch of the crime scene to scale
It depicts the overall layout of a location and the relationship to evidence. Measurements need to be specific enough that they could recreate the scene, either digitally or in real life, for investigative purposes.
300
This chemical/product glows bright blue in the dark when it comes in contact with blood.
Luminol
400
Used on crime scenes that are comprised of readily definable areas, such as in houses or buildings.
Zone Method
400
The type of questioning used at the beginning of an interrogation
Baseline questioning: used as a starting point for comparison of physiologic behaviors of the person of interest
400
Someone who law enforcement thinks may have information related to a possible crime.
Person of Interest
400
Finger print pattern where ridges curve to form a circular shape
Whorl pattern
400
Indentations on the gel where the DNA is loaded into before running electrophoresis.
Wells
400
The blood type that is the universal donor
O-
400
The importance of knowing the crime scene ambient temperature.
To calculate time of death. Really hot and cold temperatures can affect decomposition rates.
400
What sort of information can we obtain from digital media?
Who they were with, their mindset before death, places they visited, communication with other people, timeline of events before death
500
Used on crime scenes with no physical barriers, such as open water. Can either begin at the center and move
Spiral Method
500
The types of questions a polygraph uses
Yes/No questions
500
Branch of science that analyzes evidence for investigative purposes regarding criminal and civil matters.
Forensic Science
500
The inner most part of a hair shaft. Can be absent with some hair types
Medulla
500
Adenine's base pair match
Thymine
500
The blood type that is the universal recipient
AB+
500
The person that conducts the autopsy of a deceased person
Medical examiner (Pathologist)
500
Can two people have the same fingerprints?
No
600
Search method used on small circular crime scenes
Wheel or ray method
600
The reason why polygraphs are not admissible in court
Not always accurate, some people can manipulate their responses, too many variables
600
The importance of finding certain insects on a dead body or its eggs
Helps create a timeline to determine time of death
600
Name three common minutiae details
Ridge ending, fork, short ridge, dot, bridge, hook, eye, delta...
600
What nitrogenous bases are purines?
Guanine and Adenine
600
The component of blood that helps with clotting
Thrombocytes or Platelets
600
A function of white blood cells
White blood cells are part of the body's immune system. They help the body fight infection and other diseases.
600
Anything that stimulates an immune response.
Antigen
700
The professionals that examine the location, distribution, and shape of blood droplets, stains, puddles, and pools.
Blood splatter analyst
700
The name of the measurements—specifically pulse rate, temperature, respiration rate, and blood pressure—that collectively measure essential body functions.
Vital signs
700
The name of the key on a crime scene sketch that has the date, time, location and temperature
Legend
700
Name the 3 main fingerprint patterns
Arch, loop and whorl
700
What nitrogenous bases are Pyrimidines?
Thymine and Cytosine
700
This blood type has no antibodies in the plasma
AB
700
The two different types of blood identification tests
Presumptive and confirmatory testing
700
The reason why we analyze hair at crime scenes even though it can't 100% positively ID someone
It can eliminate a person of interest
800
What is the name of one strategy investigators use to identify a particular area from which they take all their measurements on a crime scene sketch?
Point of origin
800
How could you manipulate a polygraph by trying to control your heart rate from increasing?
Hold your breath or purposefully trying to calm yourself down
800
The reason for wearing PPE at a crime scene
To protect yourself from bodily fluids, and to prevent contamination of the crime scene
800
A fingerprint pattern where ridges curve back on themselves forming a particular shape
Loop
800
What is the matching strand:
ATGATCCCGGCCATG
TACTAGGGCCGGTAC
800
The relationship between height and blood spatter diameter
The higher the distance from the surface, the larger the diameter of blood
800
Liquid portion of the blood
Plasma
800
The most common presumptive blood test. This test uses a compound known as phenolphthalein, which reacts with the iron carried by hemoglobin
Kastle-Meyer
900
What is the term for an educated guess?
Hypothesis
900
What is the term for physical changes in the body due to stress or anxiety?
Physiological Change
900
The reason the hand-written note is important in the Anna Garcia case
Possible fingerprints, and analysis of the handwriting, might indicate suspects
900
Whose hair was on Anna's back?
Eric Piedmont (boyfriend)
900
Using HaeIII, where would the following strand be cut:
ATGATCCCGGCCATG
TACTAGGGCCGGTAC
ATGATCCCGG|CCATG
TACTAGGGCC|GGTAC
900
Another name for white blood cells
Leukocytes
900
This blood type has no antigens in the RBCs
O
900
A protein produced by B cells in the blood; works to impair pathogens. Also called an immunoglobulin.
Antibody
1000
What is used to create an experiment?
Experimental Design
1000
If a polygraph is inadmissible in court, why do they conduct them?
To guide their investigation
1000
What is theory that every time you make contact with another person, place, or thing, it results in an exchange of physical materials.
Locard’s Exchange Principle
1000
The most common presumptive blood test. This test uses a compound known as phenolphthalein, which reacts with the iron carried by hemoglobin
Kastle-Meyer Test
1000
What is the process of creating a DNA Profile?
Obtain DNA Sample, PCR (copying DNA), Restriction Digestion, Gel Electrophoresis
1000
The protein in red blood cells that carry oxygen through the body
Hemoglobin
1000
In an experiment, the group that the researcher expects to have a positive result, to show that the experimental setup was accurate and capable of reproducing results.
Positive Control
1000
Blood test that reacts with hemoglobin and turns a violet color. Usually used on porous surfaces, such as a large stain on a carpet
LCV- Leucocrystal Violet