Crime Scene Investigation

Question 1

What 4 types of gloves are used in forensics and what for?

Answer 1

NITRILE - protection from acids and alkaline solns, hydraulic fluid, fuels, aromatics, some solvents and cut resistant

NEOPRENE - protection from acids, solvents, alkalies, bases and most refrigerants

POLYVINYL CHLORIDE - alkalise, oils and low concs of nitric and chromic acids

LATEX - resist mild acids, caustic and germicides, degrade around heat and gasoline

Question 2

Define the terms ‘Artefact’ and ‘Feature’

Answer 2

ARTEFACT - human made or modified portable object

FEATURE - non portable artefact

Question 3

Define the the terms ‘Datum’, ‘Matrix’ and ‘Provenance’

Answer 3

DATUM - fixed reference point for all 3-D processing and measurements (something permanent)

MATRIX - the surrounding material of the scene (eg. Soil, water, living room)

PROVENANCE - origin and derivation of an item in a 3-D space in relation to the datum and other items

Question 4

What are the 3 steps in searching a scene?

Answer 4

1. Preparation
2. Secure the scene
3. Secure the evidence

Question 5

What are the 3 patterns for searching a scene?

Answer 5

1. Strip/Lane
2. Spiral
3. Grid

Question 6

What are the 4 ways of transmitting dangerous objects at a crime scene?

Answer 6

INHALATION - airborne contaminants easily inhaled into the bloodstream

SKIN CONTACT - transmission through physical contact during collection

INGESTION - toxicity of chemicals and biological contaminants through the digestive system

INJECTION - through the piercing of the skin upon contact