In What is Traffic Accident Reconstruction And Cause Analysis?, collision speed expert witness Patrick Scott Moore writes:
Why use a Reconstruction Specialist?
Attorneys understand the law and the procedures of a civil suit or criminal trial. However, most attorneys do not have the expert knowledge required to explain the causal factors of a traffic accident. Therefore, attorneys generally use experts to assist them with their more complex cases. A reconstruction specialist can evaluate and assist in the preparation and presentation of a technically involved case, as well as, testify as an expert.