Wolfe showed exactly why Dr. Welcher did not use dummy in his tests. No one knows exactly where John O’Keefe was actually standing at the time of the hit/side swipe.
However, imo, the parts showing the sudden shatter of taillight pieces helped the CW’s case. The dummy arm thingy, not so much. Is the jury to believe that because of ARCCA's testing the microscopic taillight pieces found in John’s clothes were planted... Not possible to plant evidence seen only by a microscope. Interesting that Wolfe left out the back door dent, scratches and marks on the SUV. Additionally, the taillight shatters, but clothing doesnt get any tears, by (shifting to reverse, and accelerating up to 24 mph) 6,000 lb vehicle impact, in the cold ... common sense.
My own opinion.