IANAD, and I have not been anywhere near a motel since prior to Covid, BUT in the case of clarification, IMO any heart wall/muscle damage that can be seen at autopsy, (or via Angiogram) is caused from a Previous heart attack. Damage occurs over time....just like any muscle in your body. It can only be visible well ( days at least ) after the event, if you live after a heart attack. If GF had any type of Cardiac arrest ( which he did, on 5/25/20 ) the heart wall/muscle damage from this episode would not be evident at autopsy. That is why the witness made it clear, when he repeatedly stated, " No evidence of a previous heart attack".
Tricky, nonetheless Nelson missed it