The action you took was the very best thing you could have done. Lawyers are quick to tell people what the should, or should not do. They don't tell you how to live with it after wards. In law enforcement we had a 90-10, 10-90 concept that sure seemed to be right on the ball. 90-10 means 90% of the people only do 10% of the crime, and 10-90 means 10% of the people do 90% of the crime. Killing someone is as big a crime as we know of. It seems as if everyone who kills someone, such as in this case, at some time that person sits in judgement of what they did. They will know if the reason they did so was because it was the only thing they could do to stay alive. Or if it was because they thought they could get away with it. Today, when so many murders are "thrill killings" the fact that so many of these killers don't realize what they've done until much later is terrible. So many of them can't handle it. If thy cannot handle it, what chance does a decent person such as yourself
do. I don't know if you have reached that point yet or not, but after that the healing starts. You may be called different names by those who tell you you should have killed the man, but they are idiots. You did a damn good job!