Side note: A poll asking people if they thought Z was "guilty" is an inflammatory charade. Certainly he shot Martin in the context of an altercation, but how many people in the general public have any idea what the legal standard of criminal intent is for 2nd degree murder? Is he "guilty" of having shot Martin? Of course. Guilty of second degree murder is a matter on which reasonable people might disagree, even if they are fully aware of the legal standards and definitions.