The defense attorney argued that the shooting death of his client's wife might have been suicide, but the dead woman had two gun shot wounds to her head? Two? Suicide? Am I missing something?

History Guy:

yes, you are missing something. Depending on the location of the gunshot wounds, one of them could be what are known as "hesitation" wounds. The person trying to commit suicide flinches at the last instant and delivers a non-fatal wound. They then shoot themselves again, often succeeding where they failed the first time.

Early in my law enforcement experience we went to a scene where a man had shot his wife a children then himself. He didn't die immediately and was transported to the hospital. The doctors discovered two gun shot wounds to the head. No one else could have administered them but him.

I don't know enough about this case to say it's a possibility, but I'm betting that's what the defense is driving at.