Seems like you're not listening to your own advice.I think you are trying too hard here to unravel the very basic concept of reasonable doubt.
Most of us have probably seen Twelve Angry Men. You want a jury that doesn't lock into a predetermination. ...
Speaking for myself (but it also seems pretty consistent with the others you're arguing against) our whole argument is based on the evidence and are open to more evidence showing something different coming about. That is exactly the way science works. As of now, the evidence is stronger for a 'natural' cause.
Meanwhile people like Lo and Harry are simply pissed off that the evidence doesn't currently support their gut feeling.