But Thallium doesn't cause "bleeding of the nose and ears shortly after ingestion".
There are quick acting poisons, but not with those symptoms.
So far the mustard gas theory was the one that matched the symptoms and very short timeline.
People considered warfarin, ricin, but the symtoms and timeline couldn't be made to match.
Thanks for the info. I know thallium is deadly and was used in rat poisons. In rats, at least, it kills quickly.