Do not approach or touch your attacker. He may be "playing possum".
First, make sure your opponent doesn't have any friends lurking. If you don't feel like you're safe in the area, go ahead and leave, but proceed to the nearest area of safety and make your phone calls from there. Go as little distance as you need to to get to an area where you feel safe. This is part of self-defense. Going further is called "fleeing the scene." When subsequently asked, "Why did you leave the scene?", answer, "I did not feel safe there under the circumstances. I was afraid for my life if I stayed there. So, I went to the nearest place where I felt I was safe, and I called from there."
Next, CALL A LAWYER!
Third, Call the police. You're not gonna cover this thing up, baby (sorry, I saw Austin Powers this weekend). The boys in blue are gonna find out sooner or later. It'll look better if they find out sooner and from you. When you talk to the dispatcher on the phone, be sure to assert that you acted in self-defense. That way, when the 911 tapes are played in court, the jury will hear you assert from the first minutes that it was self-defense.
Next, clean any blood off of yourself. In this day and age of blood-borne pathogens, don't take any chances. Again, this is a justifed part of self-defense. When asked why you did this, when accused of doing it in an attempt to cover up the evidence, you can say, "I did not know this man. I was afraid he might have AIDS or something, so I washed myself off." Any juror will understand that.
But, don't try to clean anything else up. That's called "tampering with evidence." Don't disturb a thing. (There is only one exception: if you can do so safely (again, do not approach your attacker), secure any weapons. If, for example, your attacker's gun or knife is on the ground a safe distance away from him, go ahead and secure it. This can be justified in court.) Anything else could be perceived as an attempt to "cover up" a crime and that'll really detract from any claims of self-defense. Especially avoid any attempt to alter the scene. For example, do not put a weapon into your opponent's dead hand. You'll never get it right. Your deception will be discovered and will really look bad in court.
When the police arrive, be polite and cooperative, but assert always that you acted in self-defense.
Finally, as soon as one of the badged ladies or gentlemen says, "You have the right to remain silent..." Do so. When asked further questions, be polite, but say, "I acted in self-defense. I am confident that the facts will show that because it is true. I would like to cooperate with you fully. But you have arrested me for a serious crime. My attorney told me that if I was ever arrested for anything, I should not answer any questions or make any statements until he is present." It's important to use the phrase "My attorney told me..." because the police do not want to come between an attorney and his client.
Realize that you are probably going to be arrested, handcuffed (possibly right in front of your neighbors, spouse, and even children (and this can be really confusing for children because on TV only bad guys get arrested)), and taken to jail. There'll be years of criminal and then civil legal proceedings. Your actions in the few minutes following the incident can make a huge difference.
Chuck
[This message has been edited by Gollnick (edited 16 June 1999).]