The online Courtroom Testimony for Expert Witnesses course has continually been a great success! We have had participants from across Canada and the US, the UK, Norway, Australia, and New Zealand. The…
Troubling Trend in Expert Image Comparison Evidence in Canada?
A recent Canadian case has highlighted an apparent issue that is affecting how some courts are assessing the probative value and admissibility of expert image comparison evidence. This article reviews…
Cognitive Bias and Forensic Experts: Preserving Independence and Learning to Say No
Cognitive bias among forensic experts is a significant issue that can lead to unsupportable conclusions and miscarriages of justice when undetected. It may also result in the exclusion of evidence…
When Are You Considered an “Expert Witness”?
As you accumulate course work, conferences, training, and experience during your professional career, it is natural to ask whether and when you can be considered an expert and be tendered…
Reverse Projection Photogrammetry: When is Measurement Uncertainty an Issue of Admissibility?
A home security video surveillance system captured relevant events that transpired outside the home before and after two murders were committed nearby. Of note, it recorded images of a person…
Who is Qualified to Express an Opinion on Image Comparison?
A fundamental question in the forensic process of image comparison is what qualifies a proposed expert to express such an opinion for the court’s consideration. Various contenders ranging from people…
State Supreme Court Rules on Admissibility of Expert Motion Tracking Evidence
In dynamic video-recorded scenes where several people move around within the frame and from camera to camera it can be difficult to accurately track the movement of individuals. This makes…
Canadian Court Restricts Evidence of Forensic Video Analyst in Murder Trial
In preparation for a Canadian homicide prosecution, a forensic video analyst performed several technical and analytical processes on video images that captured relevant events. The defence objected to most of…
The Pedagogical Expert Witness: Teaching Complex Science in the Courtroom
The following article, applicable to experts in all areas of expertise, was written by me in conjunction with my Courtroom Testimony for Expert Witnesses course and will soon be published…
Image Technology and Visual Literacy Issues in the Rittenhouse Trial
The November 2021 trial in State of Wisconsin v. Rittenhouse garnered significant media attention across the United States, in part because of its rather sensational facts, and in part because…
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