BIB - You may be able to see it from that perspective, but it is still against the law. To be a licensed gun owner, you have to pass a firearm competency exam. Licensed gun owners are aware that it is illegal to shoot at an unseen or unidentified target, regardless of how frightened you are. Even if you can see the person and you identify them as an intruder, if they are not actively threatening your life, you cannot legally shoot. Further, the law requires that if you're able to safely escape an imminent threat on your life, you must do so. Killing another human being is only lawful if there if no other option available in order to protect your own life. It must be your last and only resort.
Yes and yes!! Re-watching the trial and the part with the firearms dealer who administered OP's gun exam, it really drove home the law to me again about what is permissable, in terms of putative self-defense, vs. what we might happen to intuit is a reasonable use for force. Myself, I've long-thought he was as guilty as sin, but I DID worry there could be room for his version (i.e., benefit of the doubt) re: the level of threat he claimed to have felt (especially as related to his "vulnerability" claim). But on his gun exam, he answered correctly a series of questions (and I paraphrase closely) -- this exam being based on the SA handgun laws--e.g.:
'it's late at night in an isolated area far from police and two unknown men scale yr fence. you're not expecting anyone, you don't know them, and it's very late -- can you shoot?' --
OP wrote "NO"
'you see/hear them break the security bars of yr house and enter -- can you shoot?' --
OP wrote "NO"
'from behind a security door, you see them stealing your expensive hi-fi. They turn to you and tell you to get out of here. Can you shoot?' --
OP wrote "NO"
'you're NOT behind a security door. They turn to you. One's brandishing a knife, the other, a gun. They tell you to leave or they will shoot you. Can you shoot?' --
OP wrote "YES"
So, this tells me there needs to be certain qualities for an absolutely imminent threat that would justify lethal force on OP's part: little distance/no barricade/a lethal weapon/a verbal statement of intended violence (and the means on hand) from the assailant(s). In OP's actual case, *none* of these attributes exist. Even if we believe HE believed there was an intruder, there still existed distance, a barricade, no (sight/knowledge of) a lethal weapon from the "burglar," and no statement from the "burglar" of intended violence.