Questioned Document Laboratory

Questioned Document, Forgery Detection, Signature Alteration, Altered Document, Anonymous Letter, Anonymous Writing, Disguised Writing, Ink Alteration, Indented Writing, Forged Document, Disputed Wills, Fraudulent Documents, Hidden Writing

Ultraviolet Paper Examination

Questioned Document, Forgery Detection, Signature Alteration, Altered Document, Anonymous Letter, Anonymous Writing, Disguised Writing, Ink Alteration, Indented Writing, Forged Document, Disputed Wills, Fraudulent Documents, Hidden Writing

Latent Image Development of Indented Handwriting

Weldon & Associates LLC maintains a reference library of Questioned Document Examination texts, research  papers, articles, and a fully equipped private laboratory as defined by the Scientific Working Group for Forensic Document Examination (SWGDOC) standards.  

•       Microscopic examination with incidental and trans-lighting

•       Ultraviolet Examination (paper and markings)

•       Magnifiers and various measurement tools, including typewriter grids and overlays

•       Infrared spectroscanner (ink examination; non-destructive procedure)

•       Photographic evidence (production of exhibits for courtroom demonstration)

•       Detection and reproduction of indented writing (Latent-Image Development; non-destructive procedure)  

By Referral:

•       Ink comparisons - thin-layer chromatography (TLC) (destructive testing)

•       Video and Audio Tape Enhancement

•       Latent Fingerprint Examination

•       Electron Microscopy - Paper, Ink, and Fiber analysis

•       Typewriter and copier analysis