Very many witnesses , meaning a large majority claim to have heard a longer pause between the 1st and 2nd shots and then a very short pause between the 2nd and 3rd shots . Most said that the 2nd and 3rd shots were very close together , which I think eliminates the so called shots fired from the Mannlicher Carcano ( Mauser ) which had no prints on it until a late night trip to the morgue and the inked hands of a dead Lee Harvey Oswald put some prints on the rifle . This saga is much like the 9/11 bogus story of planes crashing into the twin towers and making them both collapse at freefall speed into their own footprints and of course Bldg. 7 which was not hit by a plane but collapsed freefall style in it's own footsteps as did towers 1 & 2 . There was not one jet engine found at Shanksville PA , the Pentagon or in New York City . Sorry, but the JFK assassination and 9/11 tragedies were shoved down our throats like we were supposed to just believe them and go on with our lives . If you care to ask a Physics Professor about these events , be my guest .
