4. Forensic Examination If Questioned Documents Flashcards
Whats the scope include ?
Handwriting signatures printing papers Ink altered documents
What do forensic document examiners do ?
Identify individuals fromhand writing identify signatures as genuine or fake origin and history of documents
date documents
identify altered documents
identified counterfeits
Facts about handwriting ?
No two adults write the same handwriting is partially taught
mature writing from 19
writing gets worse with old age
Directly observed to analyse
What are the handwriting styles ?
Printed - block capitals
cursive - joined up
script - cursive formed but separate letters
mixture of the last two
Insividualisation of handwriting
Individualised by personal characteristics
Vary with the time
some letters stay the same some letters change dimentions of letters space and direction and do not change very much
How do people disguise handwriting ?
Change slope or style change some letter designs use other hand use a stencil copy or trace
Whats needed to compare documents ?
Good controllable light clear working surface magnifier with scale Low power stereomicroscope Keeping casenotes
What does natural writing look like ?
Smooth, gradual transitions
What does unnatural writing look like ?
Rough- blunt endings and breaks
Whats a tram line ?
It’s where pen strokes cross
What do microscopic striatuons show ?
Direction of pen
When examinning letter structure what do we look at ?
Structure and formation of letters number order and direction of strokes point of entry degree of roundness proportions of letter point of cross bar placing a dot spacing of letters
What’s the five-point scale for conclusion
Conclusive evidence that both written by the same person
supporting evidence that both written by same person but possibly by different people
inconclusive
supporting evidence that both written by different people but possibly by the same individual
conclusive evidence that both written by different people
What are the three functions of document examination system
Control wavelengths of illuminating light
control the wavelength spread used to image the document
utilise the sensitivity of digital cameras to radiate im the ir spectrum
