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Published on Nov 19, 2015

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PRESENTATION OUTLINE

LOCARD EXCHANGE PRINCIPLE

CROSS TRANSFER OF EVIDENCE BETWEEN SUSPECT AND VICTIM OR LOCALE

MORPHOLOGY

FORM AND STRUCTURE
Photo by Roberto Trm

POLYMER

A MOLECULE CONSISTING OF MANY IDENTICAL REPEATING UNITS, CAN BE NATURALLY OCCURRING OR SYNTHETIC.

CUTICLE

TOUGH, CLEAR OUTSIDE COVERING OF THE HAIR SHAFT.

CORTEX

MIDDLE LAYER OF THE HAIR SHAFT THAT PROVIDES STRENGTH, COMPRISES MOST OF THE HAIR MASS.

MEDULLA

THE SPONGY CORE OF HAIR THAT GIVES IT FLEXIBILITY

KERATIN

A TOUGH PROTEIN POLYMER MADE UP OF ABOUT 20 DIFFERENT AMINO ACIDS. CROSS-LINKING MAKES HAIR RESISTANT TO CHEMICALS.

CORTICAL FUSI

IRREGULARLY SHAPED AIR SPACES IN THE CORTEX
Photo by quapan

UNDULATION

IN HAIR MORPHOLOGY, SLIGHT WAVES

MICROMETER

ONE-MILLIONTH OF A METER, ONE THOUSAND OF A MILLIMETER

ANAGEN PHASE

PERIOD OF GROWTH IN THE HAIR CYCLE, AVERAGING THREE TO FIVE YEARS

CATAGEN

INTERMEDIATE PERIOD OF HAIR GROWTH, LASTING ABOUT THREE WEEKS

TELOGEN PHASE

FINAL PHASE IN HAIR GROWTH, RESULTING IN THE LOSS OF HAIR IN ABOUT THREE MONTHS

ASSOCIATION

A LINK BETWEEN AN UNKNOWN SAMPLE AND KNOWN EVIDENCE

QUESTIONED

TERM USED IN FORENSICS TO DESCRIBE AN UNKNOWN ORIGIN

EXEMPLAR

TERM USED IN FORENSICS TO DESCRIBE A SAMPLE OF A KOWN ORIGIN

METABOLITE

A SPECIFIC PRODUCT OF A SUBSTANCE, FORMED BY CHEMICAL PROCESSES IN THE BODY

FALSE POSITIVE

A TEST RESULT THAT COMES OUT POSITIVE WHEN IT SHOULD NOT, OFTEN CAUSED BY CONTAMINATION