You are walking to your vehicle in the evening from your preferred supermarket.
During the course of your situational awareness scanning you notice a young man following about eight yards to your rear.
He could be going to his own car, he could be following you. He's making no indications of violence though your senses go off and tell you to be wary.
He looks at you and Condition Yellow Takes a step into Orange.
He's still doing nothing but walking the same direction you are walking though he seems to be just as aware of you as you are of him.
You reach your car and are about to put your things into it when you see him make a move.
Orange blasts into Red and you swing around, gun in hand, to find yourself pointing a gun at a startled and terrified young man with nothing in his hands.
Now... just assume (for the sake of this scenario) that this is what has taken place... no cheating by saying "I wouldn't let that happen to me," or "I would never have done X," or "That wouldn't happen to me because of y." Stuff happens to all of us and we are going to assume that, by whatever circumstance you are now staring down the top of your firearm pointing at a POTENTIALLY good OR bad guy.
What do you do?
Did you make a mistake? Did you preempt an attack?
Do you tell him to get away knowing that he could be nothing more than an innocent guy trying to go home too?
Knowing that since your gun has come out you are going to call the police do you do so at that very moment or attempt to leave the scene and call from distance?
What do you tell the police?
Considering you very well could have just committed assault with a deadly weapon, how do you attempt to keep yourself out of jail?
How do you handle this?