Earwitnesses hearing crossfire would have to indicate a conspiracy, but as far as I know out of the vast numbers of witnesses who heard shots they said the shots seemed to come from one direction.
And we know for a fact that both Kennedy and Connally were shot from behind and the steel frame around the windshield also shows damage which must have come from behind the Limo so without crossfire earwitnesses we can only assume that all the shots came from behind.
JohnM
At least You are Now endorsing shots being fired from the Records Bld behind JFK. This is progress.