Hypothetically, suppose you saw a shady guy creeping around your yard. You draw your gun and chase after the guy. He escapes your yard and is well on his way to freedom when you shoot him a few times in the back.
Well, when the cops arrive they discover a bloody hacksaw on the victim. They go to his house and, sure enough, discover several bodies showing signs of torture. You just shot dead a serial killer who might have been scoping you out for the next victim.
But you didn’t know as much at the time - by your state of mind, you had absolutely no legal reason to shoot.
Could you be prosecuted for second degree murder or similar charges? How likely would a conviction be?
I bring this up because of this : http://www.foxnews.com/us/2014/01/18/fla-man-arrested-for-chasing-and-shooting-burglar-dead-claims-self-defense/
The guy was creeping around, and he had a gun on him. More likely than not, this man was preparing to commit a burglary or armed robbery. After the fact, given the behavior of the victim, the shooting seems justified. (a nonviolent burglar or innocent trespasser won’t carry a gun. More than likely, the victim intended to commit a crime and use the gun if necessary)