Here's some info I found interesting:
"There's a specific TN or federal statute (can't recall it) that says you can't instigate or invite a confrontation, and then use deadly force. Meaning, if you challenge someone into an altercation, you can't then claim a right of self-defense. If something is similarly in place in FL, I don't know how you could successfully argue that following him - especially when he admitted as much, and was told not to do so - wasn't inviting a confrontation.
And that Z was armed, which the rules of Neighborhood Watch specifically prohibit, seems to indicate that he was not only beyond whatever bounds (however informal or unimportant their rules may be, from a legal sense) it required, but was acting as a vigilante, instead. If this guy wasn't a member of Neighborhood Watch and this situation unfolded, where he was following a guy after being told not to do so, and it lead to a fatal shooting, you'd think he'd have to have some infallibly tangible proof as to why he used deadly force, or he'd be in a cell somewhere. Wouldn't he?Here's an excellent overview of TN's deadly force laws, which I presume are closely aligned with FL's as they share recoproctiy, from a Nashville-based law firm: Nashville Criminal Lawyers Explain Self Defense in Tennessee: When can I use Deadly Force for Protection?"