Uh, the only "standard" procedure that I'm aware was not followed was nine off-duty agents' having a few drinks the night before, which was (and still is) against Secret Service regulations. Subsequent investigation determined that this incident had no effect on the events of November 22. So what other "standard" procedures do you believe were not followed?

Let's start with something you posted yourself...
JFK Assassination....."I tend to agree with you, though, that it didn't matter whether Greer slowed down or maintained speed--the important point is that he didn't immediately speed up or take other evasive action, either of which might well have saved Kennedy's life."

As the link below states...

..what about limo driver Greer who, despite a direct order from his superior sitting in the front seat a few feet away, does not speed up the car out of danger-in fact, Greer turned around not once but TWICE and can be seen in the Zapruder film looking directly at JFK when the fatal, final shot makes its mark (Greer denied looking at the President, slowing down, or turning back around [let alone twice] to the gullible Warren Commission under oath).The second turn around happened AFTER Kellerman told Greer to get out of line; as Kellerman told Manchester, "Greer then looked back in the car. Maybe he didn't believe me"....

Greer "had no special training..."

He was trained just fine; also, he had plenty of experience. Finally, who needs "special training" --- even a snot-nosed 16 year old knows how to HIT THE GAS! Keep in mind that Greer DISOBEYED his superior's order to get out of line BEFORE the head shot arrived.

http://www.acorn.net/jfkplace/09/fp....ssue/saic.html

The links below list some of the many violations/deviations from Secret Service standard protocol on Nov.22, 1963...

http://www.acorn.net/jfkplace/03/VP/04-VP.html

http://www.acorn.net/jfkplace/03/VP/03-VP.html

http://www.jfklancer.com/LNE/limo.html

A little bit more than a few drinks the night before....