According to the author of the law, they cannot. Stand your ground law, permits residents to use deadly force if they "
reasonably believes it is necessary to do so to prevent death or great bodily harm to himself or herself or another or to prevent the commission of a forcible felony." "He has no protection under my law," former Sen. Durell Peaden (the author of the law) told the newspaper.
It is the fact that Zimmerman ignored the 911 operator's advice not to follow Martin that former Sen. Peaden says disqualifies him from claiming self-defense under the law.
"The guy lost his defense right then," Peaden told the Miami Herald. "When he said 'I'm following him,' he lost his defense."
http://www.cbsnews.com/8301-504083_1...rayvon-martin/
I would doubt that the judge in the case would go against this interpretation, but you never know, depends on how good GZ's lawyers are at muddying the water, please remember, the law often times has NOTHING to do with justice.
Often times the winner in any case rests not on who is guilty or not guilty,
but as who is the best at arguing and muddying the waters.