For a classic example of leading and brow-beating witnesses -- and of putting words in witnesses' mouths -- look up Specter's depositions of witnesses at Parkland Hospital re his "magic bullet"...
IMHO, Specter is one of the most dangerous people in the USA...
Let me take a canned ham and put it front of you so you can hide behind it. I’ll take a military rifle and shoot the ham. You can even leave it in the can. According to your theory, you should be perfectly safe.
Arlen Spector was right once in his life. The Kennedy Assassination was that one time.