Forensic Science Midterm

using logic to draw conclusions from given facts, definitions and properties

Deductive reasoning

Items containing blood or other fluids should be stored in

breathable containers such as a paper bag or bindle

Who created Locard’s Principle

Edmond Locard

When two people come in contact with each other a physical transfer occurs

Locard’s Principle

The central core of a hair fiber is called the

Medulla

two main parts of a hair

follicle and shaft

first step of matching a fiber to a location

see if colors match

tracks who has access to and is responsible for a piece of evidence. If the chain is broken it means that the evidence was tampered with

chain of custody

household chemical that should be heated in a vapor tent and produces a white print

Cyanoacrylate

 Luminol blood test causes

blood to fluoresce or glow

A+ can donate to

AB+ and A+

most reliable test you could run to compare 2 fibers

warp and weft and burn test

hair and fibers CAN’T be used to

convict a suspect

hair and fibers CAN be used to

Place someone at a scene, track someone, and rule out suspects

North, Measurements from 2 fixed points, Index of evidence and the correlating number, Date, scene number, signature of artist

things that need to be on a crime scene sketch

Unmovable points in a crime scene (ex. Corner of wall, stove, door). helps investigators to accurately recreate the scene if needed and show evidences proximity to other things

fixed points

information you should include when bagging a piece of evidence

name of collector, date and time, crime scene number, description of evidence, and evidence number

helps rule out suspects if their handwriting doesn’t match, can identify if something was forged, and can help tell the personality of the writer

handwriting analysis

effects that drugs, exhaustion, illness, human error, age, and mood have on someones handwriting

limitations of handwriting analysis

Identify the Blood type

A+

identify fingerprint pattern

tented arch

identify fingerprint pattern

double loop whorl

identify fingerprint pattern

plain arch

identify fingerprint pattern

plain whorl

which signatures are forged

2 and 4

2 best tests to use for identifying a red stain as blood

luminol test and kastle-meyer

iodine can be used on

porous surfaces

problem with Iodine

results aren’t permanent

If you ask 5 eye witnesses to recount a crime they saw, what might happen to their stories?

they will all have different stories, perspectives, and descriptions

what is cyanoacrylate

super glue