Even if armed I would try everything within reason (so long as it did not put me or my family at greater risk) to avoid using deadly force. If I determine that deadly force is necessary to prevent death or harm I will use it to the best of my ability to kill the aggressor.
I also believe that George Zimmerman had no choice except to use deadly force. There is also no evidence that George Zimmerman did anything that escalated a confrontation. He did not even realize he was in a confrontation until attacked without cause.
Note: Zimmerman passed several lie detector tests at the police station. He gave statements to the police without his right to counsel. This is not the action of a guilty man.
True. However, these actions are not in general a good idea. Even if you are innocent.