In a graphic courtroom demonstration, a crime scene expert described how Maggie Murdaugh witnessed the death of her son. She was then wounded several times before the fatal shot was delivered. The expert also revealed shocking new information about Paul Murdaugh's death. With a real shotgun, the expert demonstrated the odd position the gunman would have fired from. It comes as the jury heard a 911 call Alex Murdaugh made in a bizarre incident three months after Maggie and Paul were slain.