That's a challenge. Trying to attribute an outcome to an incident or to a medication can be very difficult. When one looks at anecdotes, at single cases or groups of single cases, one might easily overlook other factors that might be at play.
When we were speaking a bit earlier—and there's no evidence for this—what role did heat have to play in this? Were people dehydrated? Was that a stressor? We don't know of other medications some of these people might have been taking. Were other substances being used? We don't know. That's why it's important to look at studies done at a population level where some of these things are controlled or where one can assume, based on the large numbers in the study, that they're being controlled.