Erich Speckin testified to the handwriting analysis in deposition, Daubert hearing, and at the trial in the case. The Judge agreed with the findings of Mr. Speckin and ruled in favor of our client. Link to text version of Opinion and Judgment — James P. Gierczk VS Paul D. Erich Speckin was retained to test a day planner in litigation.
Ink and Paper Analysis / Trace Evidence / Questioned Document Examination
Ink Dating | Aginsky Forensic Document Dating Laboratory, Inc.
There are four major approaches each approach is a group of methods used for dating inks on documents:. Other ink entries are not necessary for comparison. Aginsky has developed the SET as a result of many years of research of the ink aging methodology developed and published by Dr. Antonio A. Cantu in the s. The second ink dating approach analyzes the chemical composition of inks on a contested document with the aim to determine whether these inks as well as other materials used to produce the document — paper, inkjet printing ink, toner, stamp pad ink, etc. Such intra-comparisons of inks may reveal that the questioned entries were not written contemporaneously with the other entries in the file document.
Thanks for helping us catch any problems with articles on DeepDyve. We'll do our best to fix them. Check all that apply - Please note that only the first page is available if you have not selected a reading option after clicking "Read Article". Include any more information that will help us locate the issue and fix it faster for you. Undoubtedly, as more standards and corresponding information about the specimens are collected, there is a greater certainty of identification when a questioned and a known item cannot be distinguished after a series of analyses.
Gas chromatography-mass spectrometry GC-MS , being a well proven analytical method of determining the qualitative composition of multi-component systems, is effective for the analysis of inks, most of which are complex mixtures of chemical compounds. A combination of thin-layer chromatography TLC , which analyzes ink colored components, and GC-MS, which analyzes ink noncolored components, demonstrates high discriminating power with regard to writing inks that can be distinguished neither by nondestructive techniques nor by TLC. Case examples are considered in which coupling of TLC and GC-MS allowed one to discriminate between ink indistinguishable by TLC and to determine that the inks on questioned documents came from the same manufacturing batch. Introduction Writing inks are multi-component mixtures of various organic substances such as dyes, solvents, resins, modifiers, lubricants, thickeners, antiseptics, surfactants, and byproducts , most of which can be separated and characterized by chromatographic techniques. Chromatography was discovered in when a Russian botanist and biochemist, Michael S.