Forensic ink dating
Specifically, they focussed on the solvent known as 2-phenoxyethanol (PE), present in 80% of the inks in ballpoint pens of this type.Itxaso San Román, Luis Bartolomé and Rosa María Alonso allowed the chemical compound to age under normal conditions, without ageing it artificially, which is what happens in other methods, and studied its evaporation speed.He has been an instructor at the FBI Academy, Federal Law Enforcement Training Center, Naval Investigative Service, Air Office of Special Investigation, U.
Until now, the passing of time was detected only in a very general way, in other words, it was possible to determine whether the document was young (whether it was less than 90 days old) or old (more than 2 years).
So Datink has overcome some of the drawbacks graphology examination comes up against when ascertaining the age of a document by means of other methods.
The validity of documentary evidence is of paramount interest in many different types of litigation (and all of these situations are actual cases in which Federal Forensic Associates has provided examination, consultation and testimony).
With advances in technology, many documents that could not be analyzed five years ago are now possible sources of important information, such as the answers to questions relating to the method and time period of preparation. Lyter began his career as a forensic chemist for the Bureau of Alcohol, Tobacco and Firearms, National Laboratory Center in Rockville, Maryland.
But this technique is also able to overcome other stumbling blocks relating to the amount of ink deposited when writing and the type of paper used, as these variables hamper the dating of a document by means of traditional methods.
What is more, the new technique reduces the number of punctures needed to analyse the writing on a document to just one.That is why it is very useful for documents that have been signed as it is possible to compare whether the body of the document, if it has been written by hand, is as old as the signature. Or else it is a very useful tool to date contracts, settlements, wills or other documents. Aware of these difficulties, the UPV/EHU team began to work on samples written for research purposes.To do this, they used BIC® ballpoint pens, one of the most common makes and, therefore, the most widely used in documents subjected to legal examination.An ink formulation can be identified to a specific manufacturer to ascertain the first date of commercial availability. He trained with and served as the Chief Research Forensic Chemist with the United States Secret Service and was responsible for maintaining the largest known forensic collection of writing inks in the world. La Porte has published several scientific papers in the area of forensic document examination and authored three textbook chapters in the Forensic Chemistry Handbook (Chemical Analysis Techniques Used in Forensic Document Examinations), The Wiley Encyclopedia of Forensic Sciences (Documents, Forgeries and Counterfeits), and Forensic Chemistry Fundamentals and Applications (Chemical Analysis for the Scientific Examination of Questioned Documents).Tags: Adult Dating, affair dating, sex dating