I think G. Gordon Liddy had good advice about how to handle a self defense situation. First, use a revolver, no brass left behind. 2nd, two to the chest, one to the head, just one side to the story. 3rd, don’t call the police, just get away from the scene quickly. 4th, file down the hammer, trash the barrel, remove the serial numbers, and throw the gun in a deep river.
Sorry, that means, if you ARE caught, it goes from self defense to Murder 1.
Most of that advice (drag the body into the house, etc.) is crap.