I am not sure if this is just for the sadistic people (like myself) to see how much pain and suffering a raider went through before meeting his death, or if it is a bug. All of the other health stats (i.e moving) are gone, as you would expect, but the corpse is till in extreme pain. Bug?
At this point any bugs should be posted in the Bug forum, as the game was released. Once a new alpha needs testing, this forum will be used again.
Pain is shown deliberately to see how much pain pawn was feeling just before dying. However sometimes it would show "None" even if pawn died in pain, so that's another bug. Fixed, thanks. The pain should be always displayed as None for dead pawns. But it seems that sometimes it stays at "Extreme" level. Bug. Fixed, thanks.