Collan pockets whatever symbols and Nerulian trinkets he can, in the hopes that they might be useful clues. He then pulls out some parchment and gets some charred material off of a torch to do a rubbing of the alter's most significant symbols.
"This may take me a few short minutes, please take this time to look over the room carefully."
The cleric wears a half plate and carries a morning star and a light wooden shield. He has a (un)holy symbol of Nerull around his neck and a silver ring on his left hand.
The zombies seem to be some of the missing slaves, judging by their clothes.
After searching the rest of the keep, you conclud, hat it would be best to leave the paladin as guard by the ex-slaves and tell the town to send some carriages to transport them.
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ooc: Need your actions (spell use etc.) before you hit the road and 'marching' order.