Well in this case, i would hazard a guess, not locals, most if not all cases have been non-locals, in my case specifically an American that 'is greedy' and has no morals (hence we removed him from the company previously).Wow, would that be locals or other expats one would have to worry about?
As for danger level, quite high if he gets desperate, people look for methods of attacks, others just use a blunt object.