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Crew members on a downtown L.A. location shoot for CSI: New York were relieved yesterday when a real corpse discovered in the building where they were filming turned out to be the "mummified" remains of a long-dead tenant, and not the body of a forgotten production assistant who never returned from a curiously prolonged Starbucks run. Reports People:

Though downtown Los Angeles was subbing for the streets of New York, the corpse was real, a source close to the show tells PEOPLE, adding that the remains were found on the 5th floor of the building - only two floors below the actors and film crew.

The body, the source says, "was discovered by a building engineer who checked on the tenant because he had not paid rent for the month."

Making matters weirder is that the show has already shot an episode revolving around the discovery of a mummified body.

Luckily, police and the coroner quickly arrived on the scene to remove the body for an eventual autopsy, before detail-obsessed producer Jerry Bruckheimer could see it, be impressed by how much more "real" an actual corpse seemed than even his effects department's best work, and demand that only genuine human remains be used in all of his CSI franchises.