FIBERS

FIBER TRANSFER

• Fiber can be transferred in person to person contact
• Fiber transferred at crime scenes can help lead to the perp

FIBERS

• Fibers are not unique
• They are class evicence
• There must be corroborative factors with fibers

TOOLS TO GATHER FIBERS

• Tweezers
• Tape
• Vaccuum

FIBERS CAN BE TAKEN FROM

• Clothing
• Drapery
• Wigs
• Carpeting or furniture
• Blankets

FIBER CLASSIFICATION

• Fibers can be classified as synthetic
• Synthetic fibers are man made
• Ex:rayon, polyester

FIBER CLASSIFICATION CONT.

• Fibers can also be classified as natural
• These fibers are made by plants and animals
• Ex: wool, cotton

CRIME SCENE FIBERS

• Fibers collected at the crime scene must be tested for matches
• Sample fibers are collected from all suspects to be analyzed

FIBER ANALYZING TOOLS

• Microscope
• Spectrometer
• Microspectrophotometer

FIBER ANALYSIS STEPS

• Compare color and diameter
• Analyze dyes
• Look for unique shapes

FIBER ANALYSIS COMPARES

• Shape and size
• Content
• Dye
• Chemical composition
• Microscopic appearance