Loren Williams

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2016-06-26 45K 45 0 0

Loren Williams - Description

Forensic Science (Chemistry option) with a Chemistry minor.  .   . Questioned Documents. Intro and History. Handwriting. Activity 2. Individual Characteristics. Activity 3. Analysis. Activity 4. What is a Questioned Document?. ID: 378033 Download Presentation

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Loren Williams




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Loren Williams

Forensic Science (Chemistry option) with a Chemistry minor

 

  

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Questioned Documents

Intro and HistoryHandwritingActivity 2Individual CharacteristicsActivity 3AnalysisActivity 4

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What is a Questioned Document?

A questioned document is one in which a document in its entirety, or in part, is subject to question as to authenticity and/or origin. Any signature, handwriting, typewriting, or other marks

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Most Common Questioned Documents

LettersChecksDrivers LicensesContractsWills

Voter registrationPassportsPetitionsThreatening lettersSuicide notesLottery tickets

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Cases Involving Questioned Documents

ForgeryCounterfeitingMail fraudKidnappingCon gamesEmbezzlementGamblingOrganized crime White collar crime

Art crimes

Theft

Robbery

Arson

Burglary

Homicide

Serial murder

Psychological profiling

Deviant sex crimes

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Questioned Document History

Rural to urban Advances in ink technology Penmen

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Questioned Document History

Dreyfus AffairAlbert OsbornQuestioned Documents

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Questioned Document History

Lindbergh Kidnapping

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Catch me if you can

https://

www.youtube.com/watch?v=N4yutQ8YGHo

21:10-21:32

https://

www.youtube.com/watch?v=N4yutQ8YGHo

26:20-28:00

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Handwriting

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Questioned Document Analysis

Document AnalysisInk ExaminationPaper ExaminationMachine Examination Handwriting Analysis

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What Questions are Important?

What pen wrote this?What type of paper is it written on?Has it been altered?

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Graphologist

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Question Document Examiner

Studies scientifically the whole document The first QDE were called “handwriting specialists” because that was the primary means of agreements or contracts.

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Handwriting Theory

Handwriting is just as unique as your fingerprintsDifference between fingerprint and handwritingFingerprints are permanent and do not changeHandwriting is a learning process

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Fingerprint vs. Handwriting

When are fingerprints and handwriting comparable in uniqueness?

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Handwriting Characteristics

Class Characteristics Handwriting systems: Spencerian, Palmer, Zaner-BloserFonts: SpenCERIAN, Palmer, Zaner-Bloser Individual Characteristics

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Activity 2: Handwriting Analysis

Have ONE team member write a phrase on a piece of paper TWICE (in 2 columns)

Have each team member write the SAME phrase on the SAME piece of paper in each column

Place another piece of paper over it

Make a small mark at the top of all the possible places of each letter (y = 2 top spots) in column 1

Join all the dots with a ruler, cut the paper around the lines, then compare using the light

Place another piece of paper over it the remaining column 2

Draw lines through the middle of each letter that line up with the slope of the letter, compare the slants

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Activity 2: Handwriting Analysis

Which question matches the sample? (from the handout)

THE

SECOND ONE

!!!

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Individual Handwriting Characteristics

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Handwriting Characteristics

Class Characteristics Handwriting systems: Spencerian, Palmer, Zaner-BloserFonts: SpenCERIAN, Palmer, Zaner-Bloser Individual Characteristics

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Types of Individual Characteristics

Skill Level

SlantFormMovementProportionsHeight“I” Dot“t” CrossingLoopsPressure

Baseline AlignmentPen LiftsSpeedEmbellishmentsEntry/Exit StrokesRetracingSpelling/SpacingFormatCase

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Fingerprint vs. Handwriting

How many comparisons are required to identify a fingerprint as belonging to someone?No set number, it is up to the qualified expert examiner

How many comparisons are required to identify handwriting as belonging to someone?No set number, also up to the qualified expert examiner

Another

comparison between fingerprints and handwriting!!

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Collecting Samples or Exemplars

Exemplar – Handwriting used as a standard for comparison with the document in question.

2 types of exemplars:Dictated or requestedUndictated or collected

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Activity 3: Unknown Handwriting

Match the question with the correct exemplar

Document your process of what and how you did everything

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Questioned Documents Analysis

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Ink Analysis

Chemical composition of ink Visible-light microspectrophotometerDifferent wavelengths of lightDetect different inks, changesThin layer chromatography

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Alterations

ErasuresDisturbs paper fibers Differing InkObliteration

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Types of Fraudulent Writing

Freehand simulationsPatching or retouchingBlunt starts and stopsPen liftsTracingGuidelinesImpressionsPoor line qualityDisguised writing

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Paper Analysis

Class characteristics

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Machine Analysis

Typewriters, printersClass characteristicsIndividual characteristics

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Activity 4: Chromatography

Make a mark on each piece of paper with each pen

Apply one drop of finger nail polish to each mark

Hold the paper vertically

Observe!!

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Activity 4: Chromatography

What happened on each sheet?

Are there differences?

Are there similarities?

Look at the colors and number of dyes in each.

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Any Questions?

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