Plot hole: What was the point of arresting Caulfield? He was released on bail almost immediately, it seems. It served no purpose whatsoever. Yes, he was fired and possibly discredited, but was ultimately free to continue unhindered with his investigation.
Plot hole: Highly unlikely that Bru, after spending days wandering around in the desert with one can of water, a dead snake and whatever else he found for food, would have the strength and energy to hold on to a flying airplane wing, then come bounding through a cemetery with healthy robust face and skin. More likely he'd be in a hospital on IV fluids after all that dehydration.
Chosen answer: It's never stated in the film, however, as the astronauts have been declared officially dead and therefore cannot ever be allowed to contact anybody, they were most likely executed as soon as they were captured.
Tailkinker ★