The man behind the wall shot Kennedy 
Oswald was just a plant paid to try ,
probably was given the gun with blanks in it.
 They killed him so he couldn’t talk
   Jack Ruby got to him pretty quick and  Oswald surrounded  by Policemen .
Jack Rubenstein was buddy buddy with most 
of the PD at the time,  and had many of them 
at the Carousel and fed them and watered em
down, and I would imagine provided entertainment 
for a few.  He was a VIP and moved freely about 
the station/ jail/ court ( municipal court only now)
The Colt he popped LHO with came from a 
store that is still in business, and a police officer 
bought it for him so as to get a discounted rate.
Old fruity ray that owned the place used to tell
the JFK  days tales all the time. I've had several 
firearms from there. 
It's a wonder that Rubenstein wasn't helping to 
escort LHO out of the building so as to ham
it up for the cameras