Family says he hadn't broken into the house because the dad shot through the door. Maybe, but the claim is that he had started to get the door open. If the dad held off shooting until the door was broken open then I think this claim is debunked. This article says that the deadbolt was locked and the door casing for the lock broken.
https://www.sidneydailynews.com/news/225535/frye-sell-issue-statment-on-fatal-shooting
Family claims that it wasn't in self defense since the kid was shot in the back. But in the video you can see the first shot was from the front. The second was on the side. And the third shot was in the back. All in a matter of less than 2 seconds. I think this claim is debunked as in the heat of the moment in self defense it is hard to stop pulling the trigger as soon as it appears that the person is fleeing. He didn't start shooting after the kid ran away and he didn't run outside and empty the clip into his corpse.
I think this is a case of play stupid games, win stupid prizes. It sucks that it happened though. In the video the kid had a look on his face like he wasn't thinking clearly. Wonder if something showed up on the toxicology report.