Forensic Science Fibers

threadlike elements from fabric or other materials, such as rope or carpet

• Fibers

• Litter

• Ligature marks

small but measurable amount of physical or biological material.

• Catagen

• Telogen

• Trace Evidence

crown-like scales pattern which are commonly found in hairs of small rodents and dogs.

• Coronal Pattern

• Spinous Pattern

• Imbricate Pattern

flattened-scale type which consist of overlapping narrow scales and are found in human hairs.

• Coronal Pattern

• Spinous Pattern

• Imbricate Pattern

Tags

NGSS.MS-LS4-2

Which of the following observations are used to help identify a specific fiber?

• smell of the burned fiber

• on contact with the flame, does the fiber coil or melt?

• color and structure of the residue left after the fiber burn

• all of the above

When fibers are transferred straight from victim to suspect or suspect to victim, this is called:

• necessary transfer

• direct transfer

• absolute transfer

• secondary transfer

If you find a strand of fiber at a crime scene, what could it help you determine?

• The time of the crime

• The type of clothing the criminal wore

• The criminal’s eye color

• The weather on the day of the crime

The transfer of evidence such as a fiber from a source to a person, then to another person, is called:

• direct transfer

• absolute transfer

• source transfer

• secondary transfer

cutting of hair which allows the shape and structures to become more distinctive and gives greater detail

• Cross Section

• Infrared Spectroscopy

• Medullary Index

A forensic scientist will ask questions about:

• type of fiber.

• number of fibers found.

• textile from which fiber originated.

• fiber color.

• where the fiber was found.