This is from a recent email conversation I had with some associates, so it'll save me some time just to copy & paste it in here:
While stationed in Cuba '94-'95 we'd occasionally patrol through the minefield maintenance roads looking for Cuban asylum seekers as well as escapees from the migrant camps.
We'd find some from time to time.
You didn't have to be a master tracker like David Scott Donelan, because any tracks that we saw that were sneakers or flip flops we would just follow until we caught up with them.
They normally didn't move during daylight and were (justifiably) afraid to get off the roads, so making the grab was pretty easy.
None of them ever ran once we came upon them. I figured that they were so scared of being in the minefield and they knew if we got in, that we could get them out. If they were asylum seekers then that was the plan; get taken into custody by the US. If they were migrant escapees, their living conditions in the tent camps was more miserable than they were back home, so many of them would rather be back there.
Every so often when the Marine Observation Post (MOP) would report an American minefield explosion, we would have to go out and investigate that.
If we were lucky, two MOPs would report the explosion and we could then draft a rough intersection of where the mine detonated.
Once the general area was determined, we'd converge on the area and look around with night vision and thermal devices. If we found something suspect, we wait until morning and then the Combat Engineers from the minefield maintenance platoon would enter the minefield and look for the hole where the mine had been.
Every minefield on the US side was mapped out and meticulous records were kept.
On a few occasions the Engineers would find a dead deer near the point of detonation.
They'd recover the carcass and have a BBQ.
In 1996, Bill Clinton directed the removal of the US minefields in Cuba.
The work was complete in 1999.