Frame 303- SA Greer appears to be looking towards amateur photographer Abraham Zapruder,like he knows he's being filmed.

Z303-See the gun tip?




Z304- See Greer's elbow?



Z306- only 3/18ths of a second after Z303!


Excellent vids of SA William Greer doing his dirty duty:
http://www.immortaltechnique.co.uk/Thread-William-Cooper-One-Roll-of-the-Dice-VIDEO?page=2

Stable Zapruder Film- http://www.youtube.com/watch?v=ozx4_4DZp38

Zapruder Frames- Costella Combined Edit
www.assassinationresearch.com/zfilm/  

The above is a website where you can download the full 486 Zapruder film stills. Carefully observe frames 302-313 in a decent photo viewer and even zoom in.  Did the driver take a fatal shot at JFK? YES!
  
Greer told the Warren Commission that he only looked back once before he accelerated off to the hospital,but the Zapruder film says otherwise. See it for yourself. View the frames AND the film!

Greer slows limo down(for head shot?)
http://www.youtube.com/watch?v=VVhutKQ25_w&feature=related

Lawyer Dan Robertson says Agent William Greer shot JFK from the front:
http://www.lulu.com/product/paperback/definitive-proof-the-secret-service-murder-of-president-john-fitzgerald-kennedy/771578