Handwriting Analysis by malj

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									Handwriting Analysis
      CSI UMMC
      Uses of Handwriting Analysis
► Determine    identity of writer
     In ransom notes
     In document forgery
     In death threats
     In suicide notes
     Can you think of others?
Comparisons Are Useful Because
► No two people have identical handwriting
► By adulthood, it is exclusive to an individual
► Even disguised handwriting will exhibit
  some of the person’s individual
  characteristics
        Standard Comparisons
► Includesample to be analyzed
► Samples from individual
   Collected writing comes from prior to the
    beginning of the investigation (helps prevent or
    indicate when a person is disguising their
    handwriting)
   Requested writing is a dictated text using the
    same type of paper and ink as the sample to be
    analyzed
    Characteristics for Comparisons
► Line quality – Do the letters flow or are they written with
  intent strokes?
► Spacing of words and letters – an average
► Ratio of height and width of letters
► Connecting strokes – Are capital letters and lower case
  letters connected?
► Unusual letter formations
► Pen pressure
► Slant – Left, right, slight or pronounced
► Baseline habits – Do the letters stay even on the baseline?
► Placement of diacritics – How are the t’s crossed and the
  I’s dotted?
              Magnification
► Often  investigators will use copy machine to
  magnify particular letters and subgroups
► This allows a transparency overlay for
  individual features
► Can be tricky because scale must be
  maintained
    Procedure for Murder at SHRP
Use the magnifying glass to determine who wrote the threat
► Select a single sample of a suspect’s handwriting and the
       note found with victim 1.
► Observe the general slant to the words in the note.
       Compare to the writing samples on the rap sheets.
► Select an individual letter in sample and compare it to a
       letter in the note in a similar position. In other words, compare
       an “s” at the end of a word in a note to an “s” in the sample.
► Perform similar comparisons of each suspect’s handwriting
       with note.
► Select another letter or group of letters for comparison.
       For example, compare “nd” in the note with an “nd” in an
       individual’s writing sample.
► Continue the comparisons until you have enough
       information to make a hypothesis of who wrote the note.
               Practice Activity
► Each  student in your group should quickly write
  the following and place it in a pile.
  “Forensic handwriting analysis is as easy as 1, 2,
  3. Anyone could see.” and sign your name.
► Then write “I think I get it, this is stupid” and sign
  it “Mr. Stokes” and shuffle these face down
► Select from the second group and compare to the
  samples to see who forged Mr. Stokes ’s name

								
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