So, is there any chance he didn’t do it? If this were a TV show, this “neighbor” seems a little fishy IMO. He claims the wife told him the husband beat her, which I don’t see that she’s claimed previously. He apparently even asked “how and where did they find the kids,” why would you ask that of someone who just had their kids murdered.
https://internewscast.com/news/travis-deckers-eerie-statement-prior-to-disappearing-with-his-three-daughters/