Arson & Explosives
willful or malicious intent to burn property
What is arson?
Brand, Size, Left/Right, Dimensions
What are class characteristics of shoeprints?
Natural & Synthetic
What are the 2 types of fibers?
Formers, fluxes & modifiers
What are the three major categories for the ingredients found in glass?
result of weathered rock and decaying organic matter called humus
What is soil?
Fuel, Heat & Oxygen
What is the fire triangle?
heel-toe rhythm, have distinctive arch characteristics, a short stride, and feet that slightly point outward while walking
What is the human identifiable stride (gait)?
orientation, crystallinity & amorphousness
What are the three basic properties in fiber structure?
radial & concentric
What are the 2 types of glass cracks?
46% minerals, 25% air, 25% water, 4% organic matter
What is soil composition?
Conduction, Convection & Radiation
What are the 3 fundamental forms of heat transfer?
Patent, Plastic & Latent
What are the three types of shoeprint impressions?
Microscopic examination, chemical analysis, burn test & solubility test
What are some examination tools available to study fiber evidence?
color, Fluorescence, thickness, curvature & density
What are the primary characteristics of glass?
sand, clay, silt, peat, chalk & loam
What are types of soil?
Low, High, Military-Grade, Homemade & Liquid
What are different types of explosives?
Stride Length, Step Length, Stride Width & Foot Angle
What are the 4 measurements an investigator can make if a series of shoeprints is found?
forceps, tape, vacuums & other specialized tools
What are some tools used to collect fibers?
comprehensive force, tensile force & shear force
What are the types of stress force?
combination of weathering and bedrock results in the formation of identifiable soil layers with recognizable characteristics
What is soil geomorphology?
'V' patterns, char patterns, heat shadows, and chimney effect
What are some characteristics that can direct the investigator to the point of origin?
Skid marks, Yaw marks, Skip marks & Gap marks
What are the subdivisions of sliding marks?
first truly synthetic fiber from glass filaments
What is nylon?
Ridges on Radial cracks are at Right angles to the Reverse side of impact.
What is the 4R Rule in glass analysis?
granular, platy, wedge, blocky, columnar & prismatic
What are soil structures?