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Abstract:
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In this talk, we discuss the current status of handwriting comparisons in the courts. We provide some historical background into the identification and comparison of handwriting specimens. We mention how the Roman, English, and United States legal systems learn from each other to treat comparisons of questioned documents. We discuss a number of unusual challenges in studying such documents. We describe how a handwriting examination is conducted and different statistical approaches to analyzing handwriting comparisons. In particular, we describe a dynamic model for handwriting that uses a second-order nonhomogeneous linear differential equation model to represent a handwriting sample. We present the results of published experiments that attempt to estimate error rates for handwriting comparisons by Forensic Document Examiners (FDEs) and non-FDEs.
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