There was an on-going feud between the two. He brought guns from a previous house out of fear for what his neighbors might do to him? Then stated that if his neighbors bring wrath upon, he has lots of guns? This really sounds like a person looking for a fight.
Jennings was drinking, but was he drunk? Was his BAC measured after the incident?
He fired a second shot 12 seconds after the first, because he thought he might be faking. That needs much better explanation. 12 seconds is a LONG time.
The widow said she had never seen the knife, while Carter admitted he sometimes wore one on his belt. Where is Carter’s knife now? DNA evidence on the knife Jennings had? A six inch knife is no joke.
Carter had never fired any of the guns he owned, then he stood over the down man and aimed at his head.
The statement that “when he arrived, he saw a truck belonging to Jennings in his front lawn …” needs clarification. Jennings’ truck was in Jennings’ front yard, or in Carter’s?
There was a “nasty exchange” between the two, then he went inside. That should have ended the confrontation, but he armed himself and went back outside.
Carter himself said he had never seen Jennings with the knife before, partially corroborating Mrs. Jennings statement that she had never seen the knife before.
None of these are really damning in and of themselves, but put them all together and there is some serious explaining needed, thus the continued testimony.