Scooby-Doo, Where Are You?
The Case of Carlsbad's Creepy Caverns
My contact added:
Based on what we know, the story already has a few problems:
Even if the shaman is just describing Pueblo clown spirits, not summoning them, it doesn't quite make sense. His attitude seems to be: "I'm here and the Pueblo tribes are way over there. Let's blame their spirits even though my tribe's spirits are presumably here with me."
For more on Scooby-Doo, see Scooby-Doo vs. the Ogopogo.
Below: A Navajo "shaman" explains Pueblo "clown spirits" even though the Carlsbad Caverns aren't claimed by either tribal group. Nice artwork, at least.