Superdome horror stories: apocryphal or true?

The Guardian asks whether some of the horror stories coming out of the Superdome are fact or fiction.
Unfortunately, "Mayor says Katrina may have claimed more than 10,000 lives. Bodies found piled in freezer at Convention Center" has confirmation of some of these incidents:
Arkansas National Guardsman Mikel Brooks stepped through the food service entrance of the Ernest N. Morial Convention Center Monday, flipped on the light at the end of his machine gun, and started pointing out bodies.
"Don't step in that blood - it's contaminated," he said. "That one with his arm sticking up in the air, he's an old man."
Then he shined the light on the smaller human figure under the white sheet next to the elderly man.
"That's a kid," he said. "There's another one in the freezer, a 7-year-old with her throat cut."
He moved on, walking quickly through the darkness, pulling his camouflage shirt to his face to screen out the overwhelming odor.
"There's an old woman," he said, pointing to a wheelchair covered by a sheet. "I escorted her in myself. And that old man got bludgeoned to death," he said of the body lying on the floor next to the wheelchair...
UPDATE: See also the quite-possibly-true report "Superdome, Convention Center death toll exaggerated".