Acknowledged shortcomings in a forensic crash investigation — including absence of notes, measurements, or scale plans, examination at night, and inability to produce an accurate scale plan due to resurfacing — do not render expert opinion evidence inadmissible where the facts underpinning the opinion are sufficiently identified and proved. The inability of an expert to name a textbook using specific terminology does not undermine admissibility where the underlying concept is adequately explained and not challenged as non-existent in the field.
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