There is a video of someone doing it. That is is possible is beyond doubt. Why do you assume that there were many attempts with the same padlock? Remember there must have been something unique about this attempt, because it killed him.
There is no evidence of poisoning. If the toxicology results had shown up poison, it would render all the investigation of how he got into the bag somewhat moot, would it not?
Well said boo. If people read my OP the whole thread is about how inconclusive verdicts come about. Surely, inconclusive is still a conclusion? There must be data on which causes of death produce inconclusive verdicts and adding that pool of data to the actual circumstances I have surmised must allow for a balance of probabilities? This thread has created a list of possible causes, positional asphyxia/CO2 poisoning etc. If we could know which of those deaths is known to be detectable or not detectable at autopsy then we are a huge step closer to the truth.
You think we're going to get to the truth by a bunch of amateurs speculating about it here? Better than an inquest, and a police investigation with access to the latest forensic technology? It's not fucking Poirot.