Questions Flashcards
What factors determine whether fibers are transferred or detected at the scene of a crime?
the nature and duration of contact between the suspect and the victim or crime scene, the persistence of fibers after the transfer, and the type(s) of fabric involved in contact.
What features might a forensic examiner look for in fibers found at the scene?
color, microscopic structure and transfer pattern
What are the two most common types of man-made fibers?
synthetic fibers and regenerated fibers
What else can influence the significance of fiber evidence?
the type and length of fiber used, the type of spinning method and fabric construction
What must be done to ensure preservation of this fiber evidence?
dried air being placed on their appropriate containers
What is the correct size order from smallest to largest of fibers?
Fiber Yarn Textile
How much me does it typically take for 95 percent of fiber evidence to fall off aer a crime?
24hrs
How are fibers collected?
search, forceps, vacuum, package in envelope
Where do natural fibers come from?
animals, plants, minerals
Where do synthetic fibers come from?
man made
What are example of natural fibers?
silk, wool, cotton, cashmere
What are examples of synthetic fibers?
rayon, nylon, acetate, acrylic, spandex, polyester
True or false, if there is a limited amount of fibers at a scene scientists should perform tests that damage evidence?
false
True or false, if large quantities of fibers are found at a crime scene, some of the fibers can be used for destructive procedures?
true
What are 2 destructive methods?
chromatography and burning
