@Robert8 I don’t believe the statement was ‘if you shot him once, and he’s dead, you can shoot him again.’ I tend to think the idea is along the lines: “If someone invaded your house and you shot him, shoot him again to be sure he’s dead.” This follows along with the idea that in a discovery process the DA would only have one persons’ point of view to determine if there would be grounds to prosecute the survivor.
What this premise misses is the moral issue of murder. The fact is, in today’s world, there is far more surveillance available to fall under jeopardy of becoming charged with murder by ‘trying to get away with it.’
Last, we have said nothing about the family of the deceased, if he/she was in the right or wrong may not matter in a civil proceeding. A good lawyer can be had - or - even get lucky… Would that be something you could afford to endure? But I am not a lawyer, nor an officer of the court. And your mileage may vary.