This case is fascinating.
He "didn't own a gun" but bullets consistent with the shooting were found at his house. Gun shots heard, a guy has a bullet in his head, but there's no residue to be found.
The whole thing just feels like the local cops took a look at things (or knew the guy) and assessed the situation. Then went back to the shooter and said "Yeah, we're going to do some labs for paperworks sake, but your hands look kind of dirty. Would you want to wash them first?" And then they had the courtesy to tell him "Oh by the way, if you may happen to own a fire arm that could possibly match those bullets...lose it somewhere very very far away and hard to ever trace. Yeah that would be great".
The whole thing just feels baked to me and it's got the power of public perception that makes most ignore it.