At 3:40, Warner says there are 9 metacarpal bones in the wrist, but that is incorrect in two ways. First, the bones in the wrist are called the "carpal" bones, not metacarpal. Metacarpal bones are only found in the palm of the hand. Second, there are only 8 carpal bones in the wrist, not 9.
You can see the victims throat moving when M.E. Warner shines the light on her to test for copper.