Once the debris that had hidden the hole had been cleared the caterpillar was dragged in:
Once an egg had been laid on the prey the process of filling in the burrow began:
This was an intra-species crime and the DNA of the thief will prevail in this case. Was the thief the same wasp that had fought earlier and had bided its time for over forty minutes to take the spoils? Fascinating. You can see why the Ammophila genus has been much studied.