You may not loot this corpse at this time.

[Softcore PK]

This has happened a few times for me. I get the killshot but then am not able to loot their corpse. And a couple times I've been killed, to come back and find all my money still on my corpse.. which seemed strange, especially being killed at camps that provide decent amounts of plat.

Linking to RnF, just look at the first screenshot:

http://www.project1999.org/forums/showthread.php?t=59435