While the rest of the party interrogates the prisoner, a few of you go stand guard, and search the bodies... After the set-up, roll over one of the bodies...
"This one's still alive!"
PCs hurry over and drag the dead man off, sitting him up against a tree. Interrogate him, loudly, for a few minutes. Then backhand him. Finally, get very angry, pull out the heavy crossbow, load it, and demand answers. Getting none, put a bolt through the (dead) man's heart.
Pick up the body and carry it over to the prisoner. Dump it on him. Search the body and take his gear (weapons already taken before dumping, of course). Repeat the beginning of the above scenario. Interrogate the prisoner, loudly for a few minutes... then backhand him. Finally, get very angry and load the crossbow... Works best with a Half-Orc Barbarian Bad-cop, and perhaps the Cleric as Good-cop.