Just a theory, not a rumour......Or why Mr. LD was out exploring, stole fuel from his vehicle, put it into their own and realised too late it was not compatible (petrol, not diesel or vice versa), flipped out and went back to try to steal his vehicle in anger and frustration and either deliberately injured him/killed him, or accidentally ran over him when leaving? (If it was dark, they could have ran over him if they couldn't see him or something). It seems Mr D had not unpacked any of his gear for camping, was he camping there, on the way to camp or on the way back - but as usual, the almost complete lack of information makes it so difficult to understand anything...