My nephew is a battalion chief for a fire dept in san diego and he says that the only medical calls they get for weed are all related to edibles or the occassional BHO disaster,lol.
THC causes mild tachycardia. Taking a lot of it at once can cause more pronounced tachycardia. This is something I must be aware of as someone with recently discovered heart issues.
In someone who is already sensitive (BP issues, heart issues, anxiety issues) high doses of THC can cause some pretty big problems for them. Not, generally, life threatening (though in a worst case scenario, it could be). The distinction that marijuana cannot cause death due to acute toxicity (overdose) is true. However, someone who is at risk for--say--a heart attack or something along those lines can possibly die as a result of the effects the drug does have.
This is not precisely an overdose, and that's why it's often said that you cannot overdose on MJ. From the coroner's point of view, it is also not possible to determine whether or not MJ exacerbated the cause of death--so they can't really comment on it from a medical standpoint. All they can say is THC was present in the person, not what it caused.
I expect the reality is that there are some people who were high risk individuals medically who have in fact died after smoking marijuana, earlier than they would have otherwise had they not smoked it--but you will never hear of an overdose, nor will you ever see any information that passes the test of "beyond a reasonable doubt".
It's worth noting, in this same vein, that most medical calls that fish is referring to have only begun in recent years as potency has gone up and up (and concentrates have become more and more common)--and almost universally they are connected with the tachycardia inducing properties of THC. There has, actually and demonstrably, been a fairly big wave of ER visits related to people smoking pot and having an elevated heart rate that has been growing in intensity year on year for at least the last 10 years or so.
I'm willing to bet my career that if we rounded up a bunch of high risk individuals for heart attacks and smoked them up with concentrates, we could watch one of them die in the lab. Of course that would be grossly unethical so we'll just never know unless some case is reported from a hospital (which could likely happen as MJ becomes more pervasive).
So yeah, there are some concerns here--but as far as these people:
One of them fell out of a building because they are dumb or were on some other drug.
Another one is a penis, or a whacko, who killed his wife and deserves what's coming to him. IDGAF if he took morphine or not, lots of people take morphine and smoke pot and don't kill people. If he's mentally disabled, I retract that, but I submit it has jack shit to do with weed.