I don’t think we have enough facts yet to come to a conclusion. The media is biased and the case is politically charged.
1)Zimmerman as an neighborhood watcher called in “an suspicious person” to 911 and was told by police “to let us handle this
2)Zimmerman ignored this and left the safety of his car and followed Martin despite the police telling him not to.
3) Up to this point Martin was unarmed and had done nothing illegal
4) An confrontation ensued between Zimmerman and Martin.
Martin was fatally shot.
5) Neither Zimmerman's life nor property nor anyone’s elses life/property were in danger until Zimmerman injected himself into the situation.
6) Neither the Castle doctrine not the Stand Your Ground law allows for the lethal use of firearms where life is not in imminent harm.
Had Zimmerman followed the 911 operator’s instructions to let the police investigate this situation, Martin would still be alive and nobody outside his neighborhood would ever have heard of Zimmerman's name.
I am a strong supporter of the Second Amendment and of open/concealed carry laws. It is this reason why I strongly condemn the abuse of the right to own and bear arms as it is apparent in this case. IMHO
We who appreciate this precious right must admit to ourselves that not all persons who do carry are not responsible owners. Unless we condemn those who don't we ourselves risk being counted with them as "gun nuts" by anti-gun forces.