The author will be adding new references that are relevant as they are published and some more worked examples from time to time. Mike Allen s career in forensic document examination spans thirty years during which time he reported on thousands of cases at all levels of the judicial system and gave evidence in court on numerous occasions.
About the Author xi Series Foreword xiii Preface xv Acknowledgements xix About the Companion Website xxi 1 Introduction 1 1.1 Historical background 1 1.2 Is document examination a science at all?
Care must be taken when inks are deemed to be indistinguishable using any testing method.
can be used to identify the individual who wrote that document.
Sometimes two inks can look identical to the naked eye but further tests may be able to distinguish between them. For example inks can be examined using infra red or ultraviolet reflectance at various wavelengths or using visible light but examining emissions from the ink in the infra red area of the spectrum (infra red luminescence).
Our examiners use an instrument known as a VSC 2000HR to carry out non-destructive specialised lighting examinations.
This book, aimed primarily at students studying forensic science and document examination in particular, introduces all of the essential ideas that are to be found in the work of the forensic document examiner in a concise and straightforward way.
Each examination type is described not only in terms of its procedural basis but also the science and reasoning that underpins it.
The reader will be able to relate the different kinds of interpretation skills used by the document examiner to those used in other forensic disciplines.
This means that we can use high end techniques to examine inks such as Matrix Assisted Laser Desorption Ionisation Time of Flight Mass Spectrometry.
Differentiating inks can be important in cases where a document is suspected of having been altered.