Both Mark and Don are expressing concern over the well-being of Felipe in the mountains of southern Peru.
These concerns are based on the lack of movement of his satellite transmitter over the last three days, the signal strength from a low battery, and the low temperature of the unit.
Mark suggests that he has either removed his transmitter (which we have seen before) or that he has met his end.
Usually, in these cases, we wait for a few more days to see if there is any change but three days without movement is not good.
If this situation continues unchanged, we will send someone to the site with a GPS unit to see if they can determine what has happened.
At least his last location is within reach of a road this time.
More as this unfortunate situation develops....