this isn't WEED that killed someone though. this is SATIVEX. it may be derived from weed, but the lack of the other cannabinoids present in weed may have caused the complication. who knows. we definitely need more scientific research on this.
but as far as I know, the cannabinoids all act in cooperation with eachother to some extent, so lack of certain cannabinoids and too much of another can EASILY cause horrible complications.
this is not a confirmed death from cannabis, this is a confirmed death of a complication of sativex.