It takes some heavy duty tools to cut thru bones and stuff to say nothing of the mess it would make............
They may have killed him but I doubt he was dismembered.......
Regardless of what the truth/value of this story may be, one does not need more than a sharp knife to dismember/butcher a large game animal. Basic knowledge of anatomy and disjointing is easy. Any hunter who bags, tags and carries his game out of the field knows this.
Do smart watches link directly to the internet or do they use Blue tooth type links to a device nearby (like my hearing aids)? I avoid such stuff as much as possible....
It's an embassy and undoubtedly has a commercial scale kitchen. More than sufficient tools to dismember a body. And I'm sure there were showers and shower curtains.