I'm not sure that not providing the information is quite the same as... "we don't have it!" I agree we need the evidence and it's not forthcoming so is it real or is it not? If they wanna keep it secret then - No Proof and we should go about our business - Proof and we need to investigate where it came from. They can not win if they are honest.

Things like toxic chemicals, fungus, radiological transmissions of energy, 'potions filled with poisonous concoctions' aka Sorcery, can harm and kill.. They are story tales spun up by insane demonic infested rich bastards..