Maybe. In those situations, usually someone takes a spill, knocks their head, and that's what does them in. This guy was "asphyxiated," so I'm guessing strangled. Maybe one guy tried to render the other guy unconscious with a choke-hold and went too far. But there was two of them. Maybe they were after something or doing something and didn't want to be identified.
It’s a mystery, that’s for sure.