Stand Your Ground
The main problem I have with this case is that Zimmerman did NOT follow instructions and continued to give chase.
He did not see Martin breaking into a house or mugging someone....he did not see him do anything other than walk across the lawn wearing a hoodie....none of which is a crime!!!
Zimmerman could have simply called it in and had a deputy come investigate and find out if Martin had a right to be there or not.
Imo, the only job of a neighborhood watch is to keep an eye out and report any suspicious activity to the proper authorities.....nothing more. Zimmerman chose to take it beyond that and the result was a horrible tragedy. That is why vigilante justice never works.
"Light travels faster than sound. That is why some people appear bright until you hear them speak."
Larry the Cable Guy