I'm no specialist but have followed this topic throughout the year's. There was no blood spatter analysis in 1963, the year the assassination happened. Since then blood spatter analysis was invented, perfected, and became a standard technique by law enforcement in murder investigations.
Sheri Fiester, now deceased, was a retired blood spatter analysis expert and looked at the Zapruder film of the assassination. She noticed that the blood coming out of jfk's head exited in a forward direction during the fatal shot, indicating that the shot came from from the direction of the blood spatte