CALIBRATING EVIDENCE SENSORS...
Handwriting Analysis, Signature Authentication, Altered Inks & ESDA
The forensic examination of handwriting, signatures, forged contracts, disguised writing, anonymous threat letters, altered cheques, and indented writing impressions to establish authorship and reveal tampering.
Individuality of Handwriting: Writing is a complex neuromuscular motor habit developed over years, producing unique identifying characteristics that cannot be perfectly simulated without hesitation.
Systematic comparison of class characteristics (system of writing, slant, baseline) and individual habits (pen lifts, tremors, initial/terminal strokes, hi-atus, shading, and crossing strokes).
From scene cordoning to laboratory instrumentation and final deposition.
Apply corona discharge and cascade toner to visualize latent indented impressions from writing on preceding notepad pages.
Expose suspicious documents to variable infrared and ultraviolet wavelengths to detect overwritten figures and spliced text.
Analyze pen lift hesitations, stroke intersection overlaps, and motor tremors to author Section 45 expert opinions.
Official instrumentation deployed across accredited FSLs & independent crime labs.