Bizarre mass poisoning case flummoxes experts

what seems weird to me is they say they have this drink, but not test samples....whats up with that? for such a horrible event, sure seems rather slack.....what about testing the bodies....may be difficult but gives far for information than "nosebleeds"

First new information since the poisoning reached the paper is that physical examination of the bodies showed no injuries (I take it the police mean externally inflicted injuries - can't imagine autopsies on 13 dead people would yield no physical abnormalities apart from nosebleeds). Samples taken from the scene are currently being analysed at a laboratory.

(Okay, not supposed to speculate, but if I were the police I'd have a few questions to ask the survivors - especially the one interviewed after the tragedy.)