Well no it does not make sense. You would not get the death penalty for self defense manslaughter, if it can be proven to be self defense you will not be in trouble at all. second you wouldn't stab anyone with a gun, you would simply be shot end of story.

Also, D3v there is no such thing as accidental murder, the legal definition of murder includes the word aforethought

"When the people find that they can vote themselves money, that will herald the end of the republic."- Benjamin Franklin