Warning: I am going with has been published in the regular media. Grain of salt and all that.
Doyon told investigators that he was asleep in the home and woke to find an unknown man holding a gun to his head. He says the man demanded the keys to his safe, and that as Doyon was opening the safe he grabbed an M-4 rifle and began shooting at the unknown man.
Doyon says the man took his wallet and $100 cash. A search of the shooting victim revealed a cell phone in his hand and a gun on the ground nearby, but no sign of the cash or wallet.
Detectives due to the fact the victim was running away from Doyon, and the lack of evidence of a theft, Doyon was arrested and charged with 2nd Degree Murder.
In Spanish we say “Enemigo que huye, puente de plata.” (Fleeing enemy gets a silver bridge.) Sun Tzu preached “Build your opponent a golden bridge to retreat across. Both give us the same message, Let that bastard get away. You are not in warfare and there are no legal brownie points to achieve by shooting a feeling criminal.
Once the Bad Guy makes clear he is disengaging, your window for self-defense is closed. The bullet that 2 seconds before would have been a non-issue because it was used in a justifiable shooting is now evidence in a murder case.