Brenda Petty is a Handwriting Analyst & Forensic Document Examiner Expert Witness located in Duncan, Oklahoma.
Handwriting is unique to each person, with distinctive features that help to identify and verify different characteristics of the individual. Handwriting analysis has been an area of research for many decades and attracted many researchers from diverse research disciplines, including graphology, psychology...
In the questioned-documentsunit, examiners study handwriting and typewriting to determine author or authenticity. They may also analyze inks and papers as well as copier toners and other forms of writing. They may be called upon to determine the absolute or relative age of a document and are ...
OMNI Document Examinations of Illinois and Wisconsin, Certified Forensic Document Examiners, providing handwriting expert witness, analysis and document examiner services for forgery and questioned documents.
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The core of the Likelihood Ratio method is that the (handwriting) expert is limited to an opinion on the evidential value of his findings in light of the hypotheses. The evidential value, or simply the LR (Likelihood Ratio) is defined as the ratio of two probabilities: the probability of ...
The forensic microscope has a single channel microscope. It also has a stereoscopic observation through timed alternate side changes in the illumination angle in front of the microscope lens, and/or the observation angle after the lens. The microscope may use fluorescent stimulation in the range ...
The forensic microscope has a single channel microscope. It also has a stereoscopic observation through timed alternate side changes in the illumination angle in front of the microscope lens, and/or the observation angle after the lens. The microscope may use fluorescent stimulation in the range ...
For example, in handwriting it is necessary to estimate a suspect's writing profile based upon a sample; thus, the resultant likelihood ratio has additional uncertainty associated with it. We illustrate various interval estimates for the likelihood ratio that naturally account for this uncertainty. ...
The developed statistical methods are presented in the context of forensic handwriting comparisons and are used to estimate the rate at which the random match probability (RMP) decreases as a function of the amount of writing available in the comparison samples. Although presented in a forensic ...