Ron Jr. is a flat out liar as far as I’m concerned.
I watched the short segment on 20/20 last night with the wife and Ron was saying he couldn’t really point to anything specific but it was a feeling he had at the time and then mentioned something about notes by the phones. It’s clear to me he was really reaching when he wrote it and now he’s catching flak and back peddling a little.
Like others have implied - Ron needed some money to pay off a bookie - and beating on his dad’s grave was the easiest way to do so.