Since I was involved in this here is my POV:
After encontering the OP and his friends, they told us that they are fixing their car and its missing only a few parts. After a short conversation, we decided to walk away but heard the car start as we were leaving and realized that the car is in working condition, at least for the most part.
We came up with the plan to rob them for their vehicle, Sam going in on foot while I was roughly 300-400 meters away on a hill just East of their position. I had a perfect line of sight with my PSO-1-1 scope and if they tried anything or ran anywhere I would have plenty of time to kill them since it is an open field (no cover). I told Sam to make sure to tell them that he has friends in the hills (not sure if he actually did) but I fired a few shots in front of the car to make sure that they didn't think he was bluffing and I tried to damage the back tire so they wouldn't try to drive away (I had a tire repair kit on me to fix it once we took the car, but this didn't go as planned of course since two of them were dead and apparently there were three of theirs on the way). Either way, there was no way of them knowing how many of us were there exactly. So it would of been in their best interest to comply (especially since they are in an open field and I fired warning shots that obviously didn't come from Sam), otherwise they are suicidal.
I was up on the hill for the most part, I came down for a minute or so and went back up once one of them said that they have three guys on the way. I assume it was a bluff but I didn't want to risk it so I came back up the hill. I did not hear any conversation except for the moment when I came down the hill and heard one of them whistling (which was odd considering the circumstances).
Also, osku197. You wouldn't know for sure how many of us were on overwatch, as I stated above so if you did try anything you all would have been dead. You were in an open field.... No cover, and I was just 300ish meters away. There would be no scenario where you get out alive if you chose to shoot Sam.
Unless the staff requires me to make another post, this will be my one and only.