FSC239Y5 Lecture Notes - Lecture 7: Cyanoacrylate, Black And Yellow, Ninhydrin

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silvermouse444

5 Jul 2018

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Lab submissions

Property

oEvidence frim divisions

oEvidence frim guns and gangs

oEvidence from FIS

Common items

oFirearms

oAmmunition

oDrug packaging.

Lab analysis

oFingerprint Examination

Range of techniques

Technique is dependent upon the substrate

Techniques can be sequential

Fingerprint Exam

oReactive substances

Eccrine Sweat

Mostly water

Amino acids and proteins

Primarily on palmar and plantar surfaces

Sebaceous Sweat

Lipids

Primarily associated with hair follicles.

Foreign materials

Dirt

Blood

Bodily secretions

oFinger print features

Ridge can split into two – Bifurcation

Ridge ending

Short ridge

Ridge dot

Island

Enclosure

Double bifurcation

Trifurcation

Ridge crossing

Substrates

Porous

oPaper

oLeather

oTape

Non-porous

oPlastic

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FSC239Y5 Lecture Notes - Lecture 7: Cyanoacrylate, Black And Yellow, Ninhydrin

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