I'm dealing with another state where I am not familiar with the practices and the law.
http://criminal.findlaw.com/criminal-law-basics/self-defense-overview.html
Police have to investigate but the title of the news article is:
http://www.usatoday.com/story/news/nation-now/2015/10/19/church-shooting-possible-affair/74234900/
If you slapped my face and there were no witnesses around, would my face turn red? Yes.
The man got the other man's wife pregnant. If there were no witnesses around, would you believe there was fighting before? Yes or no?
Even if you don't have any evidence, is it okay to believe the probability of a fight existed before this incident?
The fact is that the pastor filed a police report on the man before so they have a history together.
You can believe anything you want but I'm waiting on the authorities to make a determination and for the legal system to play itself out.