Earlier quoted context omitted.
You completely misread the point. We don't know the truth, if it was foul play or not. Probably not. BUT, it doesn't matter about the size of the jump, yet the fact that it's even a POSSIBILITY THAT WE HAVE TO CONSIDER ... is scary. Plus, it's not as large of a leap as you think, it goes hand in hand. Everyone is familiar with journalists disappearing in countries like Turkey.
No, you don't get to do that. You can't say "I'm speculating that this person might have been murdered. Wow, look at what the world is coming to, that people are even considering the possibility that this person was murdered. (Besides, sometimes people do get murdered...)" This is begging the question in its most basic form.
I don't think you can ever legitimately accuse someone of a logical fallacy who isn't making an argument.