[GilesB]

That puts an entirely different light on it.

Unarmed is irrelevant if they broke into his house - so leave that emotional rhetoric out of it - but finishing off the wounded girl, who was no threat at that point, was waaaaay over the top.

[wideawake]

Unarmed is irrelevant if they broke into his house

It is relevant.

If you severely wound an intruder, but he is armed, you are likely justified in shooting him again because you fear that he is still able to use his weapon even if he is injured.

But if someone is lying on your floor, unarmed and gutshot, then we're not dealing with self-defense anymore.

[Bubba Ho-Tep]

It gets worse. Apparently the guy had the whole house wired and the killings are caught on audio. From another report, "According to an audio recording of the incident, the man, Byron David Smith, shot the teenage girl, Haile Kifer, in the chest and then taunted the 18-year-old, telling her she was dying in the final moments of her life, before repeatedly shot her until she died." source